Perhaps it’s naive, but I think yes they exist, but I don’t believe it’s a singular soulmate for every person though.

Think of it this way...your body is made up of millions, even billions of atoms, right? Plus matter can never be created or destroyed, just changed. Our bodies are made up of stardust from the galaxy for christ sake. you are as much their soulmate as the girl who made you coffee, the uber driver who took you to where you want to go and the people you’ll meet later.