Wifi gear based on Realtek chipset can be troublesome.
From a search vid 2357 pid 012e at DuckDuckGo I found you may try a custom build script for rtl88x2bu found on AUR
A prerequisite is kernel headers for your running kernel - e.g. linux515. You can verify this using mhwd.
Did you remember to install headers for your kernel?
The active kernel is printed - take the last word and replace $KERNEL in below command with your active kernel - in the example below it is linux60
$ mhwd-kernel -li
Currently running: 6.0.5-1-MANJARO (linux60)
The following kernels are installed in your system:
* linux515
* linux60
pamac install $KERNEL-headers dkms
Then
pamac build rtl88x2bu-dkms-git
- [HowTo] Use the AUR
- [root tip] [How To] Kernel - Headers - DKMS
- [Need-To-Know] About Manjaro and AUR
Shell command to extract the manjaro kernel package name
$ mhwd-kernel -li | head -1 | cut -d' ' -f4 | tr -d '()'
linux60