It’s supported for iPads, just locked by software [1].

1: https://support.apple.com/en-gb/guide/deployment/dep9a34c2ba...

I don't know if this is still the case but the last time I saw this discussion, someone with experience using the "shared iPad" education feature said it seemed like a massive hack, and switching users was seemingly implemented by "seamlessly" doing a full reset of the iPad to the new user, taking a bunch of time to backup the old user and restore the new one, nothing like a quick user switch on macOS, and nothing you'd want to use as a family handing an iPad back and forth.