Probably because all apps are now required to target the latest api, which means most permissions are done by user prompts, and not just by downloading the app.
The iPhone has worked like that (to various degrees) for a long time. But Apple still added their privacy label things to tell me if an app is going to try to track my location. I don’t want to download a clipboard helper of some kind and find out it’s going to ask for my GPS coordinates. I want to know ahead of time.
This is a better approach for the goal, because if there's one thing they learned from years of offering the permissions list, it's that users can't convert the concept of "app permissions" into a good mental model of "What data the app can collect on me." They just aren't on average savvy enough. So the Data Safety info answers the question users actually care about without added complexity of pretending the average user is a developer who groks what permissions mean.