It is actually a real thing?

So I have been looking at dresses for a while, but do places make like bridal tops that aren't crop tops? Like when you add a skirt to the top it looks like one piece or a dress vs a two piece outfit.


For example I was looking online at David's bridal at separates like you can get a top and a bottom skirt. The problem is they look short and you can tell they are separate. I love the idea of being able to switch out the bottom/skirt if I wanted to.
Also debated just getting a dress( very simple skirt) then adding a skirt over it because I did see some at David's Bridal online.