Call of Duty will be available for Switch under Microsoft. Halo and God of War are platform exclusives. But so are Tears of the Kingdom and various Mario titles. Elden Ring is the only game listed that's not available for Switch but is on both others.
Even then, there are a ton of games that are available across all platforms, including some AAA ones:
Mortal Kombat 11
The Witcher 3
Assassins's Creed (multiple)
Skyrim
Resident Evil (multiple)
Monster Hunter Rise
Overwatch 2
etc...
Even then, there are a ton of games that are available across all platforms, including some AAA ones: Mortal Kombat 11 The Witcher 3 Assassins's Creed (multiple) Skyrim Resident Evil (multiple) Monster Hunter Rise Overwatch 2 etc...