Which is useful, because the Steam Deck's panel is actually a portrait tablet RGB display rotated to landscape, which means when you are using the desktop mode

Which is useful, because the Steam Deck's panel is actually a portrait tablet RGB display rotated to landscape, which means when you are using the desktop mode of the Deck, the subpixel layout is actually V-BGR! Of course, if you connect it to an external monitor, you need to change that back to RGB since there is no "if monitor then pixel layout" function.