To your point here:
> I'd also love to be able to use my GPG keys via NFC, something an iPhone definitely has the hardware to do, but Apple has decided to not allow it.
This is possible since iOS13 I think. I use my GPG keys in a YubiKey to unlock my Pass for iOS app.
This is possible since iOS13 I think. I use my GPG keys in a YubiKey to unlock my Pass for iOS app.