Whys my stomach shaped like that?

I’m 20 weeks pregnant with a boy and this is my 2nd pregnancy with my first my belly was more round and my lower stomach was bigger, this time the top of my stomach looks bigger then the bottom? And part of my stomach looks flat?? Am I just seeing this or is it really like that 🤦🏼‍♀️ is that normal? And why’s it like that??