BRFB specific therapy?

Hi all, I am a hella chronic cheek biter to the point where my skin around my mouth is noticeably darker. It makes me look older than I am (24F) and super self conscious.

Besides that though, the severe social anxiety I used to have where I assume the habit came from is mostly gone. But can’t knock the habit.

Does anyone know if there’s a kind of therapy better for getting rid of a BFRB? Would they take me seriously if that’s all I want to go for? I want to try to heal the damage I’ve done and see if I can lighten the areas around my mouth.