Is this legal or safe?

I have a question I’d like asked anonymously please.
I recently went to my dad’s and he had my nieces. They are 1&2 years old. Their car seats were both there and they didn’t have any of the padding that comes on the seats. They were both just plain plastic and one had the Styrofoam broken in two spots. The other carseat had the label rubbed off so I couldn’t see if it was expired or not. These are their main carseats that the parents use for them. Is it even legal? Do I report this to someone? I can’t find anything online saying whether or not it’s safe or legal. I don’t see how it can be.