HELP! I have and event in two days and I'm having trouble with live streaming!

Hi, I need some help. I have an event Saturday where I am using my laptop with an HDMI out to a large tv for a bunch of children.

I've got the video working and audio (Adobe please after all these years have audio output to hdmi so we don't have to use another program).

My issue is since I am using my laptop as an external monitor I can't get the puppet/character fullscreen. It shows the whole CA screen with tabs and everything. If I switch to OBS (and it's on top) then I loose the controls of the character.

I just want to have a full screen of my scene where I can puppet the character on the external monitor while keeping the controls visible on my laptop for ease of puppeting.