Valve even supplies (sorta buggy) Windows drivers for the Steam Deck: https://store.steampowered.com/news/app/1675200/view/3131696... - a major selling point of the Deck is that it's just a handheld PC that happens to come pre-installed with a Linux distro designed for handheld PCs. And AFAIK all of its hardware is supported upstream, so other distros should just work by plugging in a flash drive and booting into them.