I'm trying to expand to IOS from Android, and I'm getting into some initial trouble

So I am trying to expand to iOS from Android, and it’s complicated because my android app has in app purchases, plus Google Firebase, plus googlemobileads with mediation. It all works well on the Google Play store.

I’m at the point where I’m just hoping to see a dev version of my app run on my iphone, but I don’t really have all the store products and stuff set up yet. My xcode build has two errors that I hope has an easy solution.

EDIT: So the problem was that I had remnants of old versions of unity in-app purchasing in my assets folder. I didn’t notice them before because I wasn’t building for iOS. It was a nightmare, but I was able to clean out the old junk.

UnityAds/UADSPurchasing.h file not found.
UnityAds/UnityMonetization.h file not found.

I’m not sure where those were supposed to be included in the build, or if I’m forgetting some important step. I wonder if anyone could point me to the right direction.

EDIT: The problem was that I had remnants of old versions of in-app puchasing in my assets folder. I didn’t notice them before becuase I never built for ios.