Criterion Channel is streaming 792 shorts at the moment, ranging from 1 minute movies to 40 minutes at max. You'll find shorts from 1902 to 2022. Here are link to the shorts that they should have at the moment:

https://letterboxd.com/michaelhutchins/list/the-criterion-channel-every-film-featured-1/

Edit: If the list shows all movies you can filter it by clicking on the eye symbol in the menu and click on: Show short films.