Sync for Lemmy

I'm super confused.. Nothing on this post or in the link says what "sync for lemmy" is. Is it a tool to sync reddit and lemmy?

Is this going to be for iOS or Android, or both?

I know - no ETAs, but how far approximately the first dev release is?

I hope the old ui customisations will be available, would be great.

I'm also wondering what will be done about lemmy's wierdness about subscribing to subs, where you need to search up the sub on your instance etc.

Even sharing the comment discussions is useless if the recipient isn't already from the instance (probably are but many won't be obvs), the site won't let them comment unless they find the discussion mirrors on their own instance. So how will sync for lemmy deal with these eccentricities (that lemmy devs are also obvs going to deal with in the future)??

Thanks.