Came here to say this. It's unfortunately not a new problem. I use Shadow Tech on my M1 Macbook to play windows games, and this has been bugging me ever since. The irony is that this problem is non-existent on old Macbook pros.

Here's an example of SOF solution: https://apple.stackexchange.com/a/413735

But if you search around the internet you will see different solutions proposed for it, none worked for me except for this script.

This popping up on HN gives me hope that next versions give you at least a tool to disable Wifi direct.