I’d try this fix. For a different model, but it’s worth trying (there is an edit at the end):
If not working, I think you could also try the brcmfmac.feature_disable=0x82000 as a kernel parameter, as suggested in the Arch wiki (again, for a different model) Laptop/Apple - ArchWiki
In case of troubles, provide your garuda-inxi, e.g. connecting with your mobile phone via tethering.
I just recognized I previously linked the step above the one I was referring to (which anyway included important recommendations, but I was referring to the Solution post).
Sorry for that. Now fixed in my post above.