Wow, ok! For anyone looking for a better Lemmy app, for both desktop and mobile, Liftoff seems to be a fantastic choice! Definitely already better than Jerboa is, despite some in-development quirks to be worked around temporarily.
If your "subscribed" feed is broken, set it to the subscribed feed for your instance, instead of "everything" and it should work as expected.
Check it out, it's quite good looking!