AMD's latest graphics architectures are years ahead.
More to hardware, graphics and performance than just resolution.
Yes, NBA2K19 is not the most demanding game, but it's not exactly a 2D platformer either. It's a fully 3D game.
If that iPad is running that game at 60 fps, at 5.6 million pixels (2732x2048 resolution) .... that's waaaaaaaaaaaay past the XBox One's 1080p and Switch at 720p (undocked).
You're talking double the frame rate and almost 6 freaking times the pixels of the Switch version undocked, 2.5x more pixels than the XBox One S that's plugged into a wall outlet.
That's impressive. The GeekBench scores on the CPU are freaking beastly too, the CPU destroys the PS4/XB1 and goes toe to toe with Intel i7s, it probably isn't a stretch accounting for all that the GPU is pretty solid.
I think this chip is easily 3x the Tegra X1 that's in the Switch (it is 3 1/2 years newer tech on a radically smaller 7nm node). If you put this chip into a Switch and let devs code right down to the metal, I think just about every PS4/XB1 game would doable on it, especially at a 720p resolution for undocked.
It's a shame actually this chip is probably largely wasted on an iPad, Apple won't allow console size game downloads and there's no real business model for $60 physical games on the iPad/iPhone either.