External camera

I would like to use an external camera in my Macbook (Big Sur 11.3.1) with MsTeams - via Epocam. Currently I can use an external microphone through this application, but camera does not work in MsTeams. MsTeams ver: 1.4.00.8872. As you can see in the file below - the external camera is not in the drop-down list at all. Please help.