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.
You’re right that is weird. I think most sync users including me find it to be far superior any Reddit experience, better than RES, and all the other apps or web interfaces.
I couldn’t stand Reddit in any other form after trying sync.
One thing I’m really missing is that once I’ve read a post, it can be hidden in sync so I’m only seeing new content. I’m having to re-read so many posts in Lemmy right now and just want to move on to new things!