I go to Discord for very different reasons than to Lemmy/Reddit. Lemmy allows any arbitrary number of parallel dicussions on specific topics, the same cannot be said for what's essentially a bundle of chat rooms.
There are already multiple mobile clients in development and they made quite huge jumps already.
I'm currently using connect on Android, but also Jerboa saw massive development progress - although I would wish, they would test their updates more, because there seemed to be always some kind of regression.
But didn't try it for some time now, maybe this already changed