https://wccftech.com/fix-for-m1-macbook-air-pro-and-mini-bluetooth-issues-is-on-its-way/

If you're still annoyed by Bluetooth issues on your M1 Mac, then you should be pleased to learn that a fix for it is on the way.

Early adopters of the M1 lineup of computers from Apple were treated to a surprise no one saw coming - Bluetooth connectivity issues. If you have a Bluetooth mouse or keyboard connected to your M1 powered Mac, you'll experience random signal cut-offs with no apparent fix at all. Third-party headphones and other peripherals remain affected by this bug as well, according to several different reports.