Every fighter fights under their birth planet’s gravity, so that means at least Goku and Vegeta are fighting at 10x gravity for the entire tournament.

It’s not huge, since we know they train under hundreds at this point, but that would make every destructive and speed feat they perform during the arc slightly more impressive wouldn’t it?

It wouldn't, 10x is so insignificant.

But the fact that the arena is made out of the most durable element in the multiverse would make those attack feats impressive.

10x gravity is so minimal to them at this point it probably isn't even noticeable.

Goku stood up in a black hole, 10x gravity is nothing to him.

Vegeta was training at 450x gravity way back before the android arc.