Additional meeting and call-related features and issues within Microsoft Teams for business
This has been an outstanding issue since last year, and as yet MicroSoft does not appear to have solved the issue!.
Like you my issue is not with the audio, but Microsoft's very own BT Keyboard and Mouse disconnecting when using Teams. I am now using a BT Logitech keyboard which stays connected, and a Microsoft USB BT dongle mouse (an old model I had in the draw).
The IT Team uninstalled and reinstalled BT three times to no avail, but it seems when two or more devices are connected via BT, working with Teams, the devices disconnect. I recently connected Apple AirPods and the Mouse was intermittantly connecting.