That's what I want to know too!! (っ°Д °;)っ
Hell, how'd he grow it back?
He must currently have a jawbone or else the lower half of his face would have any definition.
*would not have any definition
The jawbone which was found was eather fake for some reason (Touyas fake death needs an explanation anyways) or he somehow lost his jawbone (look at his scar on his mouth and sewing it would make sense) and has a prosthetic now. The mysterious doctor or AFO must have flicked dabi together again I think.
That is a good theory when you put it that way.
Is no one gonna talk about touya lower jawbone, how the hell did he lose it!?!?