Sorry, but it's unlikely to grow back...and it's no longer red or inflamed, so topically applying a small amount of Neosporin ointment (to ward off infection)
would probably make no difference at this point...it appears to be healing fine. (FYI, never use Neosporin "pain relief" formula on snakes, only the regular
ointment for minor wounds.) It's not rare for snakes to rub off a scale or several, & when they're dark in color (as BPs are) their pink skin underneath shows
more than you'd like, but most of us get a few scars as we go thru life...the same is true of our snakes.