Those aren't considered babies, same with silent hill, and other movies which feature demonic/zombie/monster babies. They aren't considered human, or alive, and they get portrayed in such a way that wouldn't lead the audience into assuming they were actual babies.

IE: giving demon babies the ability to sprint across a dark room, or having them be missing an eye but the other one is red and demonic, or having them fall into pieces like doll toys, or having them reach out of walls like monsters to grab the player.

As long as they're portrayed in a way that doesn't trigger a legal investigation and as long as you keep said children/kids looking or operating in a way thats supernatural or inhuman, you have leeway to put them into horror scenes.

But IF YOU DARE EVER....EEEEEVER!!! Have Michael Myers stab a child, and or baby, you can kiss your project goodbye. Cause the license holder and some government entity is gonna wake up and unleash holy hell.