“Save all tabs to favorites” on iOS?

I’ve tried ‘press-holding’ on almost every UI element and checking every menu I could think of, but I can’t figure out how to “Save all tabs to favorites” on the iOS version of Edge. (Searching online for a dozen minutes didn’t turn up anything promising, either.)

Am I missing something obvious, or has this perhaps not yet been implemented yet? (I can’t imagine syncing favorites would have came before this basic feature)