Of course there are many non-verified games that run fine as well.
For comparison, the Switch has somewhere between 5,000 and 10,000 games.
Source: Wikipedia lists about 5000, Nintendo says “over 5000”, but this website claims 10,880. Part of why the Moby Games website lists more is because it lists multiple versions of a game as separate games (Xenoblade DE is listed 4 times for example).
It’s so great to see how well proton supports so many games compared to 2018. A year later and more games are running, but many with terrible stuttery fps. Now it all works except for anti-cheat because of those terrible cheaters.
dxvk has come a long way.
Easy anticheat works on the Deck (but not as an all encompassing kernel level anticheat, obviously) but each developer has to tick a checkbox for it to ignore proton. That’s why Apex Legends works but Fortnite does not, as Epic simply refuses to allow it to out of spite against Valve.
Iirc BattlEye is the same. Maybe punkbuster, can’t remember.
Punkbuster is cross-platform, altough I’d argue it’s not relevant anymore. But there’s still many ac that don’t work, e.g. EA’s ac or Escape from Tarkov.