Would be nice if Apollo would become open-source and then we could modify it to work with the fediverse. Maybe we could have a crowdfunding to pay back Christian's work and make it opensource.
Christian isn't interested. Only person I've heard about is the person from Sync. They're making Sync For Lemmy. I'm trying a bunch so idk yet. Connect, Liftoff, Jerboa are a few. Look up WefWef. It's a site app that looks like Apollo. Wefwef.app