HelpKidzlearn: The subscription $99 per year for 1 user or $219 for a site. If you create an account. You can play 10 games for free as much as you like.
Papunet Games: They have games similar to angry birds that work with switches. Some games available that just work on attention and looking. Can be customized.
Tar Heel Reader: has lots of free switch accessible content, it has synthesized text reader, available in multiple languages, and has current age-appropriate topics created by users and teachers. Look for Tar Heel books on everything from Presidents’ day to Lady Gaga and Taylor Swift.
Tar Heel Gameplay: a collection of free, easy-to-play, and accessible games.
Hiyah.net: has powerpoint-like books all made that you can advance with a button press. All subjects.
Specialbites: More Games and some blog-type content. Downloadable slideshows (switch accessible) They also adapted some popular meme/videos with a timed play (Charlie bit me!!! ).
PoissonRouge: Check out Ten Green Bottles and Birds.