Some of them are weird, I love Out of Space, play it with my wife almost daily, not only it has a native version but it works flawlessly on the Deck and even before that it worked flawlessly on my laptop for years, yet it’s marked as Unsupported. I haven’t checked other games because I usually rely on Protondb badges, but in any case the verified is not a good marker for amount of games that work on Linux, I played metro redux years before proton and it’s only getting the verified now.