Steam constantly loses connection, retry does not work, have to disconnect fully and reconnect entirely new. I did a bug report on this as well but wondering if there are any solutions as a workaround?

Mine won't reconnect no matter what, not even with a disconnect in Steam security settings.

I stopped using GOG Galaxy 2.0 because of this a few weeks ago. Wish they'd figure out how to fix it because I'd probably make it my main launcher if it were more reliable with the steam integration.

The Steam integration is not an official one but a community made one. It won't get support from the GOG team as such. The timeout on the login token, which causes the offline on the plugin is a known issue, but if I recall correctly, it was something that was being worked on, albeit slowly.