Thanks for sharing about Sublinks. It still has the mouse(?) Lemmy icon BTW. Hopefully, they'll keep the Federation issues in priority. E.g. this (see pic) - I can never see what pic/video is posted on a Lemmy instance. Just this attachment icon and a 'blank'.
Once it reaches parity next on the milestones is moderation features and then federation. All of the currently planned tasks are available for viewing on the github https://github.com/orgs/sublinks/projects/1
Im still heavily designing a bunch of the UI for sublinks that will eventually be used instead of the current demo (current one is just showing it has lemmy api compatibility) but if you want a very early sneak peek
The front end is a work in progress but making significant headway. The lemmy frontend it has on the demo instance is just a placeholder, but the work has been progressing rapidly. I've thankfully been able to be there for it and provide input as I can.