Christian already commented on this. He said it's a lot more work than it might seem, and he's not interested in maintaining that. And I don't blame him, the poor dude needs a break from technology for a while.
In the Android world, the Sync for Reddit developer expressed some subtle interest in Lemmy, but has not committed to anything one way or the other.
I think the big push to converting Reddit apps to Lemmy apps won't happen until July. We'll have to see.