We dont know anything about what you did, and saying ‘some guides’ does not help much.
Drivers in manjaro are handled through mhwd .. did you use that, or did you do something else?
If it was something else please be explicit. We might already know it was likely ‘wrong’ .. but to what extent? If you manually downloaded something from some website and ran it then that may not be recognized by the regular means (pacman, mhwd, etc).
For now .. we can at least get system information (and what mhwd sees)
inxi -Fazy
mhwd -li -l