But you are limited in how many and the popular rides run out like 40-50 days before the day they can be used — at Disneyworld in any case. (And you can only get one fast pass for the really popular rides with 90M+ wait times)
But they aren’t doing fast passes at all right now, so it’s the full wait time for everyone at the moment. (Which is maybe a little less than normal because there aren’t a bunch of people with fast passes taking half the ride capacity)