Were you previously running Anki on this M5 MacBook Air without any problem, before installing Anki 26.05? That is, did the Anki version update cause the problem to start? If so, what version of Anki were you running previously?
Is your Windows laptop also running Anki 26.05?
Although it sounds like you’ve already tried a lot of these, please try all the other regular Troubleshooting Steps you haven’t tried already, to see if any of them might help.
I note that there have been previous issues like this in the past, but I don’t know if the previous causes are still relevant: