Then he repented. As long as he repented, Allah accepted his repentance, the Exalted. Allah accepts repentance from His servants, the Exalted, and the tattoo does not harm him after that, even though now, as far as I know.
There is a treatment for tattoos, if we have a doctor, yes.
There is a treatment that removes it, even if the tattoo is old.
Deep. That's it, this doctor we have says: he removed it. Yes, it can be removed. Praise be to Allah.
It can be removed, there is no. he can remove it, inshaAllah, as long as he does it in time, and he is not sinful, inshaAllah.