If the EPA was moving towards approving a use of oxalic acid a a varroa control, oxalic acid would still be considered a "pesticide". It would however, be part of a product that was labelled and approved for that use, still as a pesticide.
Pardon my cynicism, but if the EPA is moving in that direction, it is only because some product manufacturer sees the potential for making some money with this labeled and registered application of oxalic acid. I would expect to see this approved use in a form that is not easily duplicated with widely available hardware store oxalic acid - otherwise why pay for the testing and approval process? There would be little likelihood of the details being made public before the manufacturer has their ducks in a row.