This is my attempt at creating a LoRA designed to emphasize feet. Originally this was made long ago, but I tossed it thinking it was a failure, but after leaving it on another site and seeing how popular it became, it led me to do an update to the LoRA.
Though, I would recommend you use some form of "bad feet" embedding to offset the risk of mutated feet. I also found that decreasing the weight to a lower amount helps as well.