It allows you to choose what screen or window you want to present if that's what your asking.

That's not what I'm asking. Any teleconferencing app lets you do that.

Specifically, in Zoom, I can share from a second camera. This could be a USB Webcam, or a USB/PCIe HDMI Capture Card, or OBS' Virtual Camera plugin. I prefer the latter as it gives me lots of flexibility, can present full screen Keynote/Powerpoints while keeping my desktop/windows arranged how I like, with presenter notes up, and switch to a USB HDMI capture card with the click of a button in OBS, with custom text, transitions, etc.

Last I checked, Teams assumed any camera input was for the "Camera", not for the screen share.