Have you tried to use something else for her to bite like a chewy necklace or chewy tubes? They have helped a lot with my 2.5 year old who would bite herself when angry or frustrated.

I have bought the bite necklace and she has zero interest in them. We sent them to daycare and if I’m not mistaken I believe she almost choked on it. So we don’t use it. She’s not biting herself she’s biting us because we are saying no to things. Thank you for the advice.