Different settings for docked / portable Switch modes spotted in Unreal Engine 4

[JRPGfan]

So say a switch 3rd party multi plat runs 800p docked.... does it run like 540p in handheld mode?
Is that how this is to be understood? ei. handheld mode = about 66% of docked resolution?

Their probably aiming for 1080p docked, 720p handheld, for first party nitnendo games.