Hi guys.
I had a same issue is that I couldn't connect my bluetooth earphone to my MacBook Pro M1 Monterey OS. However, I found a solution and I hope it will be worked for you. Follow my steps:
Settings -> Network -> Advanced -> Hardware -> Configure: Manual; MTU: Custom; number: 1280.
That's all. try to reconnect your bluetooth devices. I hope it works :)
triquan17
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