Is there a “feet filler” for top of the foot?

I have very bony and veiny feet. Always have since I was young (I’m 30 currently). My feet look so gross that I can’t wear flats, flip flops, or pumps - literally anything that exposes my feet. While I’ve seen fillers on the market that help with padding in the soles of the feet to prevent soreness, I was wondering if there’s something that can help “plump up” the tops and sides of my feet?