Is it normal for my 4 year old to have this line?

My daughter has a dark line as well

It's normal on children who are tan or darker skin color. My daughters each have it also. Women of darker tones are often more likely to get this line while pregnant also.

My daughter is white asf and she has it too, I brought it up to her pedi last appointment and he just said "normal".. He's a real chatterbox.

But I thought we was the only one! It freaked me out at first lol

It's normal. I remember when I learned it was "called linea negra and most prominent in pregnancy" lol, I was like 😱 I've had this my whole life!!