okay but please don’t tell me that you’re using some vpn’s or tailsafe settings.
also did you try to shut down and reboot your router to make sure there is no problem with your router
to be honest i have no ideas anymore. the inx-command shows a network adapter but neither nmcli nor rfkill detects the wifi module.
you did that download of the iso to install it on your laptop. i suggest please download a different iso (linux mint has a good hardware detection). create a live-iso with linux-mint and boot into this live-iso of mint. this is a good try if it is really a manjaro problem or a hardware-problem.