I tend to delete wip pictures to save space, so the only evidence I have of sketches that become finished artworks is my sketch thread.
Aside from the artworks that were just doodles or quick experiments to begin with, there’s three of them that have sketches posted in that thread:
I guess you can pull them up in separate tabs to see them side by side with their respective sketches.
Edit: Forgot, some of my oldest artworks have their traditional sketches in the submissions, but I wouldn’t recommend looking at those because I absolutely suck at drawing on paper.