Looks like it will take some time to figure it out, but the developer ljdawson is looking into Lemmy support for sync.
This app is so smooth, and caching posts and comments for offline use while on the plane or in low reception areas is a clutch feature for me.
The loss of third-party apps is the reason most of us are here. Makes sense that people are a bit excited that one of the favorites is following us here too haha.