in terms of good graphics ok and I really want to play this game I often watch YouTube so I can play this game but the cellphone doesn't support it

It is a great game but my device is great but the graphics  are not good

the game is good the graphics problem is okay, the main thing is the game is really good, the game is cool the graphics can be adjusted but how come on my cellphone, I want ultra graphics why can't it, even though the ram is enough