for anyone who hasn’t heard yet, enabling “background noises” at 0% volume stops the high pitch buzzing. After enabling in accessibility settings, it should show up in your command center as a quicker way to do it (it will always revert to your last volume setting, which would be 0% if you want).
I tried to create an automation that turns on background sounds whenever my AirPods 3 connect, and in theory it should work but the automation wouldn’t play on its own. However, creating a shortcut that does this and then an automation that runs the shortcut when connecting to AirPods 3 seems to work without fail. Tested it about 20 times now, and have had no issues with the buzzing because of this.
I know it’s not a solution, but maybe it will help some of you.