One of my players is an investigator who has taken the secular medic background. He is enjoying his character, but his one point of problem is that he doesn't have a way to use his intelligence or Lore: Anatomy to roll for treat wounds or battlefield medicine.

I understand the math in PF2e is very tight, so how 'breaking' would it be to give him the chance to take a homebrew feat that is basically the Crystal Healing feat but for Lore: Anatomy or Lore: Surgery? I'm thinking I would call it "Surgical Training"

Thoughts? Am I missing a feat that already does this? Please let me know!