Follow Rob Braxman on Youtube or Odysee and you'll find that building a privacy iPhone is impossible. Apple is no 'lesser evil'.
https://www.youtube.com/channel/UCYVU6rModlGxvJbszCclGGw
https://www.youtube.com/watch?v=wmGdiCqjnq8
Personally, I'd opt for a phone that officially runs LineageOS and then install the MicroG variant for de-googling it. Then take it from there and only install privacy-friendly apps, e.g. open-source from the F-Droid store. Your path to more digtal freedom 💪🏼