Feeld is a half decent dating app for this, but I really hate suggesting a platform that still tries to rope you into a subscription by praying on insecurities around not getting many matches. But it seems like people are pretty open with what they are looking for, and it’s a pretty diverse platform.
Second for Owncast. Pretty much the only thing I know of. Or maybe screen share in a shelf hosted Revolt server?? With permissions it should be pretty easy to set up a chat only room where the person streaming is the only one that can stream and speak.
I’m going to mention SLSKD if you’re at all into self hosting. I run that on a crap laptop at home, and can access it via wireguard/tailscale, then from my phone handle adding new downloads. This is borderline a required feature for me because I learn about a lot of music via word of mouth and being able to go grab it on the spot is great functionality.
VPN worked for me and others all through uni, adding in the seed box layer seems even better.