Hello, my son has this birthmark since birth. The hospital said it was…

Hello, my son has this birthmark since birth. The hospital said it was a congenital mole, but I think it's getting bigger. The surgeon showed it to him, he didn't say much at all, just wrote "mole" on his right hand. Has anyone had something like this? Is it a congenital mole? Or what else could it be? It doesn't bother him. And I also heard that if there is such a mark, you can't get vaccinated ??‍♀️