Not able to use Bluetooth headphone mic and simultaneous audio devices even after installing Pipewire

I got a JBL T460BT headphone. I learnt that to use the mic, I need Pipewire, so I installed pipewire( sudo pacman -S manjaro-pipewire). Now, I have two problems:

  1. when I try to use the mic using HFP/HSP, the audio is muffled.
  2. The option to play sound on multiple devices simultaneously (which worked in Pulseaudio) is gone.

System info:

System:    Kernel: 5.15.6-2-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
           parameters: BOOT_IMAGE=/boot/vmlinuz-5.15-x86_64 root=UUID=fcdb9873-0f53-43d2-af1e-70d903a54569 rw quiet
           Desktop: KDE Plasma 5.23.4 tk: Qt 5.15.2 wm: kwin_x11 vt: 1 dm: SDDM Distro: Manjaro Linux base: Arch Linux
Machine:   Type: Laptop System: HP product: OMEN by HP Laptop 15-dc1xxx v: N/A serial: <superuser required> Chassis: type: 10
           serial: <superuser required>
           Mobo: HP model: 8575 v: 21.17 serial: <superuser required> UEFI: AMI v: F.23 date: 07/06/2021
Battery:   ID-1: BAT0 charge: 18.6 Wh (45.6%) condition: 40.8/40.8 Wh (100.0%) volts: 12.9 min: 11.6 model: HP Primary
           type: Li-ion serial: N/A status: Charging
Memory:    RAM: total: 7.57 GiB used: 3.06 GiB (40.4%)
           RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:       Info: 6-Core model: Intel Core i7-9750H bits: 64 type: MT MCP arch: Kaby Lake note: check family: 6
           model-id: 9E (158) stepping: A (10) microcode: EA cache: L1: 384 KiB L2: 1.5 MiB L3: 12 MiB bogomips: 62431
           Speed: 4133 MHz min/max: 800/4500 MHz Core speeds (MHz): 1: 4186 2: 4151 3: 4180 4: 4024 5: 4114 6: 4018 7: 4113
           8: 4015 9: 4109 10: 4197 11: 4086 12: 4191
           Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat arch_perfmon art avx avx2 bmi1 bmi2 bts clflush
           clflushopt cmov constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est f16c
           flexpriority flush_l1d fma fpu fsgsbase fxsr ht hwp hwp_act_window hwp_epp hwp_notify ibpb ibrs ida intel_pt
           invpcid invpcid_single lahf_lm lm mca mce md_clear mmx monitor movbe mpx msr mtrr nonstop_tsc nopl nx pae pat pbe
           pcid pclmulqdq pdcm pdpe1gb pebs pge pln pni popcnt pse pse36 pti pts rdrand rdseed rdtscp rep_good sdbg sep smap
           smep ss ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow tsc tsc_adjust tsc_deadline_timer vme vmx
           vnmi vpid x2apic xgetbv1 xsave xsavec xsaveopt xsaves xtopology xtpr
           Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled
           Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
           Type: mds mitigation: Clear CPU buffers; SMT vulnerable
           Type: meltdown mitigation: PTI
           Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl and seccomp
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
           Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, RSB filling
           Type: srbds mitigation: Microcode
           Type: tsx_async_abort status: Not affected
Graphics:  Device-1: Intel CoffeeLake-H GT2 [UHD Graphics 630] vendor: Hewlett-Packard driver: i915 v: kernel bus-ID: 00:02.0
           chip-ID: 8086:3e9b class-ID: 0300
           Device-2: NVIDIA TU117M [GeForce GTX 1650 Mobile / Max-Q] vendor: Hewlett-Packard driver: nvidia v: 495.44
           alternate: nouveau,nvidia_drm bus-ID: 01:00.0 chip-ID: 10de:1f91 class-ID: 0300
           Device-3: Quanta HP Wide Vision HD Camera type: USB driver: uvcvideo bus-ID: 1-6:2 chip-ID: 0408:5300
           class-ID: 0e02 serial: <filter>
           Display: x11 server: X.Org compositor: kwin_x11 driver: loaded: modesetting display-ID: :0 screens: 1
           Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2") s-diag: 582mm (22.9")
           Monitor-1: eDP-1 res: 1920x1080 hz: 60 dpi: 142 size: 344x193mm (13.5x7.6") diag: 394mm (15.5")
           Message: Unable to show advanced data. Required tool glxinfo missing.
Audio:     Device-1: Intel Cannon Lake PCH cAVS vendor: Hewlett-Packard driver: snd_hda_intel v: kernel
           alternate: snd_soc_skl,snd_sof_pci_intel_cnl bus-ID: 00:1f.3 chip-ID: 8086:a348 class-ID: 0403
           Sound Server-1: ALSA v: k5.15.6-2-MANJARO running: yes
           Sound Server-2: JACK v: 1.9.19 running: no
           Sound Server-3: PulseAudio v: 15.0 running: no
           Sound Server-4: PipeWire v: 0.3.40 running: yes
Network:   Device-1: Intel Cannon Lake PCH CNVi WiFi driver: iwlwifi v: kernel bus-ID: 00:14.3 chip-ID: 8086:a370
           class-ID: 0280
           IF: wlo1 state: up mac: <filter>
           IP v4: <filter> type: dynamic noprefixroute scope: global broadcast: <filter>
           IP v6: <filter> type: noprefixroute scope: link
           Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Hewlett-Packard driver: r8169 v: kernel
           port: 3000 bus-ID: 03:00.0 chip-ID: 10ec:8168 class-ID: 0200
           IF: eno1 state: down mac: <filter>
           WAN IP: <filter>
Bluetooth: Device-1: Intel Bluetooth 9460/9560 Jefferson Peak (JfP) type: USB driver: btusb v: 0.8 bus-ID: 1-14:3
           chip-ID: 8087:0aaa class-ID: e001
           Report: rfkill ID: hci0 rfk-id: 1 state: up address: see --recommends
Logical:   Message: No logical block device data found.
RAID:      Hardware-1: Intel 82801 Mobile SATA Controller [RAID mode] driver: ahci v: 3.0 port: 5060 bus-ID: 00:17.0
           chip-ID: 8086:282a rev: N/A class-ID: 0104
Drives:    Local Storage: total: 1.14 TiB used: 43.79 GiB (3.7%)
           SMART Message: Unable to run smartctl. Root privileges required.
           ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Western Digital model: PC SN720 SDAPNTW-256G-1006 size: 238.47 GiB
           block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter> rev: 10112006
           temp: 44.9 C scheme: GPT
           ID-2: /dev/sda maj-min: 8:0 vendor: HGST (Hitachi) model: HTS721010A9E630 size: 931.51 GiB block-size:
           physical: 4096 B logical: 512 B speed: 6.0 Gb/s type: HDD rpm: 7200 serial: <filter> rev: A3T0 scheme: GPT
           Message: No optical or floppy data found.
Partition: ID-1: / raw-size: 40 GiB size: 39.07 GiB (97.69%) used: 16.39 GiB (42.0%) fs: ext4 dev: /dev/nvme0n1p4
           maj-min: 259:4 label: N/A uuid: fcdb9873-0f53-43d2-af1e-70d903a54569
           ID-2: /boot/efi raw-size: 260 MiB size: 256 MiB (98.46%) used: 82.3 MiB (32.2%) fs: vfat dev: /dev/nvme0n1p1
           maj-min: 259:1 label: SYSTEM uuid: C6FD-5E16
           ID-3: /home raw-size: 58.91 GiB size: 57.73 GiB (98.00%) used: 27.32 GiB (47.3%) fs: ext4 dev: /dev/nvme0n1p5
           maj-min: 259:5 label: N/A uuid: eee647e3-a6c8-4566-9751-88fcfe638cab
Swap:      Kernel: swappiness: 10 (default 60) cache-pressure: 100 (default)
           ID-1: swap-1 type: partition size: 4 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/nvme0n1p6 maj-min: 259:6
           label: N/A uuid: cb61cf2f-d1bf-446f-a80d-b128f9df4ac1
Unmounted: ID-1: /dev/nvme0n1p2 maj-min: 259:2 size: 16 MiB fs: <superuser required> label: N/A uuid: N/A
           ID-2: /dev/nvme0n1p3 maj-min: 259:3 size: 134.75 GiB fs: ntfs label: Windows uuid: 72962F96962F59BD
           ID-3: /dev/sda1 maj-min: 8:1 size: 431.51 GiB fs: ntfs label: Data uuid: BAB0F348B0F30A21
           ID-4: /dev/sda2 maj-min: 8:2 size: 103.05 GiB fs: btrfs label: Backup uuid: afe6cea4-70eb-4e7d-96b4-36cdc962c1d1
           ID-5: /dev/sda3 maj-min: 8:3 size: 150 GiB fs: ntfs label: Study uuid: 1880FD5780FD3C36
           ID-6: /dev/sda4 maj-min: 8:4 size: 196.95 GiB fs: ext4 label: Linux-Data uuid: f0b07ff7-7a5b-4ece-8554-0ae7d30a724a
           ID-7: /dev/sda5 maj-min: 8:5 size: 50 GiB fs: ext4 label: N/A uuid: 6a35376a-d0d1-49fb-8487-c89a1f167a5c
USB:       Hub-1: 1-0:1 info: Hi-speed hub with single TT ports: 16 rev: 2.0 speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
           Device-1: 1-3:4 info: Primax Dell N889 Optical Mouse type: Mouse driver: hid-generic,usbhid interfaces: 1 rev: 2.0
           speed: 1.5 Mb/s power: 98mA chip-ID: 0461:4d81 class-ID: 0301
           Device-2: 1-6:2 info: Quanta HP Wide Vision HD Camera type: Video driver: uvcvideo interfaces: 2 rev: 2.0
           speed: 480 Mb/s power: 500mA chip-ID: 0408:5300 class-ID: 0e02 serial: <filter>
           Device-3: 1-14:3 info: Intel Bluetooth 9460/9560 Jefferson Peak (JfP) type: Bluetooth driver: btusb interfaces: 2
           rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 8087:0aaa class-ID: e001
           Hub-2: 2-0:1 info: Super-speed hub ports: 8 rev: 3.1 speed: 10 Gb/s chip-ID: 1d6b:0003 class-ID: 0900
Sensors:   System Temperatures: cpu: 57.0 C pch: 71.0 C mobo: N/A
           Fan Speeds (RPM): N/A
Info:      Processes: 311 Uptime: 21m wakeups: 1 Init: systemd v: 249 tool: systemctl Compilers: gcc: 11.1.0 Packages:
           pacman: 1347 lib: 457 Shell: Zsh v: 5.8 running-in: yakuake inxi: 3.3.09