I don't see any details, but it would be straightforward to have a token (available as a bar code or a qr code) that represents a digital signature of the photo

I don't see any details, but it would be straightforward to have a token (available as a bar code or a qr code) that represents a digital signature of the photo/identity information, with the signer being the state of Iowa. Or a TOTP to make it harder to use a screenshot for this purpose. Or for police specifically, it could look up the token in the state's database to access a photo and have a human verify that the photos match (and match the person presenting the id). The structured information is easy to sign; the photo is more difficult. I'd be curious if they had anything intended for this.