Not possible, Teams is meant to share screens for presentations, not meant to be a remote administration tool. Need to look into TeamViewer or LogmeinResucue etc. If you are needing to get that low level into remote administration.
Yeah it would be nice to have. I know it's on the uservoice and they've talked about maybe tweaking that so you could do a bit more but as of now it is what it is. I'm the same way, would like to just use Teams cause I only do support here and there and don't want to spend the money on a full license to do once in a blue moon support and Teams does it most of the time but sometimes hit that roadblock.
Quick question, sometimes during presentation I would lose the mouse control I can move but I cannot click onto pages or even simply open powerpoint/browser etc. so I stop control then I request control again then it works for a little then it stops again. what could be? like I said it works for 5 minutes or more then stops. thanks @Chris Webb