Try to force reset Wifi/Bluetooth and then install the latest driver.
- force reset Wifi/Bluetooth
https://www.reddit.com/r/ZephyrusG14/comments/ohsox6/mediatek_mt7921_suddenly_not_working/
Remove everything plugged in, including AC Press the power button for 60s ( yes the whole 60 seconds ), after that try to turn on the laptop again. This forces a reset in wifi and Bluetooth card.
- install the latest driver