The top 100 list has already been posted, but I thought this article makes some interesting observations on the list.
Overall the variety of games and experiences on that list really show how versatile the deck is, and that people can still have a great time with games that aren’t a perfect experience on the deck.
Yes, Deck Verified basically means it should run on deck as if it were designed for it specifically. It should be comparable to how well a console game runs on its target console.