I haven’t used it yet but I did just learn that rustdesk.com exists a few weeks ago. Give it a peek and see if it fits your use case.
Discord
Discord is a voice, video, and text communication service to talk and hang out with your friends and communities.
For full sharing I chose Moonlight + Sunshine which gives great visuals and sound, but it has the drawback of also outputing audio when in a call. Isn't this similar?
I'm looking for screensharing without control
Which OS are you using you can probably use someone to stop that.
Windows, but I'll be switching to Linux eventually, so I would prefer a solution that supports both OS
Broadcast-box? https://github.com/glimesh/broadcast-box
Interesting, but I find the documentation pretty light. Doesn’t help me trust it. Seems like you either have to self host a whole web server or stream to a third party websites that doesn’t really explain how security is handled.
There's an app called Guilded, but I'm not sure if it has that feature