Remember his whole back was burned, not only his wings.
I bet eri recovered his wings just like how she recovered Mirios quirk.
Oh, yeah, right. But they will regrow, wouldn't they? Or is it already growing? Because he is already doing hero work?
I think it is possible for them to grow back but since the back was also damaged, it will take a while and a lot of treatments to heal his back first and then wait for his feathers to grow back.
Where is Hawks' wings? Doesn't his wings regrow if burned in two days?