I'm not using a stream deck. My Ryzen 9 7950x was at like 40% and damn close to 95 C last night streaming Hogwarts at 30 Mbps.
I think it was just the game, though. For some reason, every time I try to stream Wo Long, there is always periodic stuttering, which makes the video unwatchable, in my opinion. (I wouldn't watch a video like that).
However, I tried it with a few other games the other day, and it seems to be actually working now.
OBS also got a major update today. Going to try out the new features.
I only see 110 on the junction temp of my card when I start messing with the settings. If I try to overclock or "rage", the junction temp immediately goes up to 110. I don't think this is an issue, but I really should run some kind of test to make sure. Otherwise, on default settings, the junction temp is typically around 90 to 95 C under 100% GPU utilization.