I get 550Mbps on 5 ghz (80Mhz wide) with my iPhone 13 and I get 800-850Mbps on an iPad pro on 6Ghz (160Mhz wide). When in the same room as the AP. When not in the same room speeds are a bit all over the map.
This is via the speedtest.net app on a 1Gbit fibre connection.
I am using new U7 Pro Wall APs.
Sometimes the controls are just better on the Emulators at least on older PC ports as they would do dumb stuff like require a mouse / keyboard for menus etc.
On the steam deck in particular when getting steam versions of games with lower steam deck compatibility ratings it often comes down to odd menu issues or controller support.