Well, my experience with mobile gaming is a bit sad.
My first phone was a Samsung Galaxy S2 Plus, it was an ARM phone with a discrete amount of RAM. At that time my phone couldn't handle heavy games, so I was kinda addicted to a tappy game called Acquarium.
My next phone was a Zenfone 2 with great amount of RAM but a x86 chipset. The idea of having a Intel CPU was very interesting (You can install a full working Windows 10 on it or also Ubuntu) but soon the problems came up: almost every app was slower due to ARM emulation performed by Houdini libs. NOT all apps are build with x86 support, but some are, and they work as you could except. In some games there were also graphical glitches.
At that time I played heavy games such us Real Racing, some MMORPG, and Heathstone. The phones was so hot that you could cook eggs on the screen. But the phone nowadays is usable and funonctional with a decent battery life (around 5-6 hours).
Up to today, my handset is a Samsung Galaxy S9+, I can play almost every game on the market but I find they annoying, maybe my "gamer self" is dead. Currently on my phone you can find only a game called Durango: Wild Lands, a nice and real survival game instead of scam games such as Last Day onEarth & similiar. Still this game reached its dead end, no much content to do on end game. So I think it will be off my phone really soon.