Same issue tested today
Headset Jabra Evolve2 75 (MS Teams version)
DELL XPS device with connected headset directly over bluetooth, functionality fine, mic is working as it should, when closing the mic = mute, when pushing the mute button on the headset it mutes.
Surface 9 Pro with connected headset over bluetooth, same as previous users said, closing the mic results muting the whole thing also the headset. Pushing the mute button on the headset = doesn't mute at all, saying mute and same second unmute.
Surface 9 Pro with jabra link dongle and headset over the dongle, everything fine. No issues and works like on the DELL device with no adapter.
Headset is already on the last firmware version. It's clearly SURFACE issue how the surface handles the jabra device over bluetooth.
Windows 10 22H2 latest updates installed..