Is this weird?

I was looking at a friend’s baby registry to order her something. She is pregnant with a girl and has a 3 year old boy. As I was scrolling through the registry I noticed she had a ton of clothes on there for her 3y/o son. I thought this was strange and kinda tacky... but I don’t have a lot of friends with babies so I’m wondering if this is normal and I just don’t know it lol.

Edit to add: Before it’s brought up, they’re not low-income or anything. They live very comfortably.