Changing default keyboard brightness level in KDE

So my laptop keyboard has three level of brightness.

  1. Off
  2. Level 1
  3. Level 2

Currently, I can set the keyboard brightness from system-tray battery Battery and Brightness option.
But it just has 2 level of brightness off and Level 2. I would like to have three level of brightness option.

System:
  Kernel: 6.1.0-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 12.2.0
    Desktop: KDE Plasma v: 5.26.4 Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Laptop System: LENOVO product: 82B1 v: Lenovo Legion 5 
    serial: <superuser required>
    serial: <superuser required> UEFI: LENOVO v: FSCN14WW date: 08/26/2020
Battery:
  ID-1: BAT0 charge: 50.7 Wh (100.0%) condition: 50.7/60.0 Wh (84.5%)
    volts: 17.2 min: 15.4 model: Celxpert L19C4PC0 status: full
CPU:
  Info: 8-core model: AMD Ryzen 7 4800H with Radeon Graphics bits: 64
    type: MT MCP arch: Zen 2 rev: 1 cache: L1: 512 KiB L2: 4 MiB L3: 8 MiB
  Speed (MHz): avg: 2728 high: 2900 min/max: 1400/2900 boost: disabled
    cores: 1: 2900 2: 2900 3: 2900 4: 2900 5: 2900 6: 2900 7: 2900 8: 2900
    9: 1664 10: 1397 11: 2900 12: 2900 13: 2900 14: 2900 15: 2900 16: 2900
    bogomips: 92658
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
Graphics:
  Device-1: AMD Renoir vendor: Lenovo driver: amdgpu v: kernel arch: GCN-5.1
    bus-ID: 05:00.0 temp: 31.0 C
  Device-2: IMC Networks Integrated Camera type: USB driver: uvcvideo
    bus-ID: 3-3:2
  Display: x11 server: X.Org v: 21.1.6 driver: X: loaded: modesetting
    dri: radeonsi gpu: amdgpu resolution: 1920x1080~144Hz
  API: OpenGL v: 4.6 Mesa 22.3.1 renderer: AMD Radeon Graphics (renoir LLVM
    14.0.6 DRM 3.49 6.1.0-1-MANJARO) direct render: Yes
Audio:
  Device-1: AMD ACP/ACP3X/ACP6x Audio Coprocessor vendor: Lenovo driver: N/A
    bus-ID: 05:00.5
  Device-2: AMD Family 17h/19h HD Audio vendor: Lenovo driver: snd_hda_intel
    v: kernel bus-ID: 05:00.6
  Sound API: ALSA v: k6.1.0-1-MANJARO running: yes
  Sound Server-1: JACK v: 1.9.21 running: no
  Sound Server-2: PulseAudio v: 16.1 running: yes
  Sound Server-3: PipeWire v: 0.3.63 running: yes
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: Lenovo driver: r8169 v: kernel port: 2000 bus-ID: 03:00.0
  IF: eno1 state: down mac: <filter>
  Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel bus-ID: 04:00.0
  IF: wlp4s0 state: up mac: <filter>
Bluetooth:
  Device-1: Intel AX200 Bluetooth type: USB driver: btusb v: 0.8 bus-ID: 5-3:3
  Report: rfkill ID: hci0 rfk-id: 4 state: down bt-service: enabled,running
    rfk-block: hardware: no software: yes address: see --recommends
Drives:
  Local Storage: total: 476.94 GiB used: 148.31 GiB (31.1%)
  ID-1: /dev/nvme0n1 vendor: SK Hynix model: HFS512GD9TNI-L2A0B
    size: 476.94 GiB temp: 27.9 C
Partition:
  ID-1: / size: 468.09 GiB used: 148.31 GiB (31.7%) fs: ext4
    dev: /dev/nvme0n1p2
  ID-2: /boot/efi size: 299.4 MiB used: 288 KiB (0.1%) fs: vfat
    dev: /dev/nvme0n1p1
Swap:
  ID-1: swap-1 type: file size: 512 MiB used: 0 KiB (0.0%) file: /swapfile
Sensors:
  System Temperatures: cpu: 33.4 C mobo: N/A gpu: amdgpu temp: 31.0 C
  Fan Speeds (RPM): N/A
Info:
  Processes: 338 Uptime: 24m Memory: 15 GiB used: 3.6 GiB (24.0%)
  Init: systemd Compilers: gcc: 12.2.0 clang: 14.0.6 Packages: 1488 Shell: Zsh
  v: 5.9 inxi: 3.3.24

Anyone ?

Please read this first, then comeback if none works. KDE only serves as a user interface, what your laptop reports cannot be changed from KDE level, only from kernel/BIOS level.

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