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).
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.