I want to go from dual booting to only using Ubuntu, I use my for gaming

I’ve been told I have a pretty powerful PC, I know there’s an i9 processor in there but I’ll be so honest, it was a gift from my dad and I’m still not sure of all of the parts in there. I can get a list if that would be helpful

I really enjoy using Ubuntu and i haven’t had any problems using it so far, I’ve booted up some games from the available apps on there

My problem is I now really love FFXIV, and I’ve seen mixed responses on running it with Linux, and I have a lot of steam games too

My question would be, does the power/ability of the PC make it any easier to run games well on ubuntu, or is it more of a lack of developer support that makes the experience poor?