People need to be forced to think twice before taking in such sensitive information as a passport or even just addresses. This sort of thing cannot be allowed to be brushed off as just a bunch of kids making an app.
But for something like a dating site, It's enough for the API to just return a boolean verified/not-verified for the ID status (or an enum of something like 'not-verified', 'passport', 'drivers-license', etc.). There's no real need to display any of the details to the client/UI.
(In contrast with, say, and airline app where you need to select an identity document for immigration purposes, where you'd want to give the user more details so they can make the choice. But even then, as they do in the United app, they only show the last few digits of the passport number... hopefully that's all that's sent over their internal API as well.)
Or by someone "government-like" such as Apple or Google.
Governments should not be confirming shit.
They'll be confirming data that is publicly available.
(not an attack on you. I have to say that every time I see someone say anything along the lines of "the government should do it")
But if they are asking for your passport, then they have access to it. It's not a third party asking and providing them with some checkmark or other reduced risk data.