It’s a computer, so yes. There are more computer games than switch games.

Apples and oranges comparison. The Steam Deck is PC-adjacent hardware that can access a back catalogue of thousands of games going back twenty years, well before the Steam Deck was even an idea.

The Switch is a game console with its own ecosystem, and it has existed for six years. Games have to be developed specifically for it. The only thing both have in common is that they’re handhelds.