I don’t see why not, USB-C has way more functionality then just for charging, even when they were on Lightning, storage accessories were made specifically for lightning so USB-C should work with other accessories.
This whole Apple not talking about an Air 4 release date now has me wondering, do y’all remember when Mark Gurman tweeted last week that Apple Stores have begun receiving shipments to be opened at a later date which he said were not iPhone because it’s too early for them, if they are not iPads either cause they should be launched soon if they are, then what is in these mysterious shipments?