i just play with unreal now and then, the biggest put off is the constant crashing tbh. i get the impression epic don’t care too much for mobile and are going all out for super high end pc games.
since unity went free it makes sense to use it for mobile games. its no longer restricted like 4.x so you get everything you might want and it all just works.
yes several back in the day (around android 2.3) all in java and c++, haven’t released anything for android using an engine yet.