Is there a way to use a monitor or smart TV that is attached to the wall for online meetings but without a cable connection to the laptop? Or if you had product examples for me, the monitor on the wall should also have a camera.
You can establish a remote connection between your laptop and the Smart TV
Ok, maybe there's a product example here, we said a camera should have it too
I think you mean Miracast, but that is limited to the transfer from the laptop to the TV.
As far as the camera is concerned, you would have to use an IP camera and a desktop client, which then makes the camera available to the program such as MS Teams.
E.g. Miracast, I have nothing to add to the camera. Your description hits the point