My wlan network dont be recognized

Today I switched to “Manjaro” (from WIN). So I’m a complete newbie. After the installation some WLANs are shown to me. Just not mine. I use the Fritzbox cable 6490. Can someone give me a tip here?
Thank you in advance

Thanks for the introductory explanation.

$ inxi -Fazy 

resulted in the following for my WLAN hardware:

  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: Dell driver: r8169 v: kernel port: ce00 bus ID: 09:00.0 
  chip ID: 10ec:8168 
  IF: enp9s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  Device-2: Broadcom BCM4312 802.11b/g LP-PHY 
  vendor: Dell Wireless 1397 WLAN Mini-Card driver: wl v: kernel modules: ssb 
  port: ce00 bus ID: 0c:00.0 chip ID: 14e4:4315 
  IF: wlp12s0 state: dormant mac: <filter> 
  Device-3: Dell Wireless 360 Bluetooth type: USB driver: btusb bus ID: 3-1:2 
  chip ID: 413c:8140

can anybody help me?