Done a bit of a websearch using searchterm: "Mediatek mt7921 Ubuntu 24.04"
Found this: [RESPONDED] Yet more Mediatek issues on AMD/Linux - #22 by AC13 - Linux - Framework Community
Look at post #22, suggesting unloading/ re-loading the driver.
EDIT: More people having BT than wifi problems with that device. Suggestion that may be solved with kernel 6.11 ref: https://askubuntu.com/questions/1537540/no-bluetooth-working-wifi-for-mediatek-bluetooth-mt7921-on-ubuntu-24-04-01-lt