Microsoft teams have problems with audio cards in all platforms. I recommend to install and use pavucontrol as mentioned before to control the audio devices presented to the teams app. I used and I have 3 audio card/devices and with pavucontrol was the only way I was able to control the audio in teams.
Doesn’t change a thing. I can see a Chromium device appearing, it has the correct device selected, but still, Teams complain that there is no output device found.
What headphones do you have? I have a bt noise cancelling headphones that do not work on any platform with Teams, but teams does list it as an output device.
My belief is that Teams doesn’t see SOF speakers (which I think the new Thinkpads have) under PipeWire and thus complains at startup that there are no speakers. If there is an analog speaker (e.g., USB headphones) available Teams will start output sound and pavucontrol can be used to direct the output sound, even to the SOF speakers.