This is present in the App Store. It's not a short line-item similar to in-app puchase presence, instead it's a full-width card that indicates details on what information is collected.

https://developer.apple.com/app-store/app-privacy-details/

The only caveat is that it's developer-published information that Apple doesn't verify.

Better yet, let’s have a prominent app category called “No data collected”. This is what I really want from every program I use including desktop. Major letdown from Mozilla on this front contrary to their marketing.

> The only caveat is that it's developer-published information that Apple doesn't verify.

Well you can guess what would happen if you get caught lying or cheating. Apple didn't hesitate to remove Epic's or Facebook's apps in the past.