Also a big part of the marketing for the SteamMachine/SteamDeck/SteamFrame is that it has a desktop mode and can be used like a pc, so i think they also have an interest in that
Even the announcement "trailer" of the steammachine showed it getting used on a Computer monitor with mouse and keyboard in desktop mode. They even said they want to improve the "Desktop mode only" experience iirc and for there more apps than just games are important.
And i personally probably wouldnt have bought a steamdeck if it wasnt possible to just go into desktop mode and do whatever.