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.
From what I remember it that is true, he let another developer give it a shot since he had no interest/experience in IOS development. Maybe he’ll do it again and a more dedicated developer will be able to complete the port this time.