There is also Aitum which does a flatpack but it seems like it doubles your encoding workload?
I think that would tank the quality of the stream. I'm on a gaming laptop (ASUS TUF A16) most of the time and I get a feeling that I would suffer some big performance hits trying to run that
So would reinstalling OBS inside Distrobox then installing RTMP be my best way forward? I saw there used to be a portable version of OBS but the github is archived