What outfit must a newborn wear in the hospital?

I’m wondering what outfit can a newborn wear after birth, like can I bring my own outfit to be put on my child right when I give birth or no? As I want to take a picture to announce in a cute outfit but worry as I don’t know exactly what the outfit can be either. Does it have to be a swaddle with a hat or can it not have a hat?? I’ve seen pictures wear they have only a headband on

Also can I have my child lay on a blanket that I bring too for the picture?

I included pictures for examples but I’m not sure if these are right after birth but this is what I mean

I’m sorry if this seems like a foolish question but I just want to know from personal experience 🥺