With this release, Ivory now UNOFFICIALLY supports additional fediverse platforms such as GoToSocial, IceShrimp.NET. I've tried these platforms with mostly success.
The better the Mastodon API support on your platform, the better your experience will be. Obviously, platform specific features like emoji reacts or reply controls aren't going to be available. Still nice!
Edit: SNAC and Hollo crash for me. Thought they worked, sorry.