Manyverse creator here. We're working on the desktop app and it's almost ready. I use it on a regular basis on my own desktop. Check a screenshot and progress report at the bottom of this blog post: https://www.manyver.se/blog/2021-09-update

Manyverse is Android/iOS only, but it talks to desktop Secure Scuttlebutt clients like Patchbay: https://github.com/ssbc/patchbay