honestly (not sure this is a ellipal thing prob a dot thing) i had nothing but issues staking dot on ellipal. after i nominated a bunch of nodes, one day it just un nominated them. not sure if it was something i did but i never approved any other transactions past the first noms.
then it would have cost me more to re nominate than i had already earned which ticked me off to say the least.
then when i attempted to unstake them I got an error that said try again later.
after about 4 attempts at different time intervals, it finally began the unstaking process which is like 20 or 30 days or something.
so i just left it be and decided to stake it on a lending platform if i wanted gains.
ive had no issues staking other tokens on ellipal which is why i think it may have been a dot issue. also it doesnt show your earnings in app only in the chain explorer (as far as i could tell)