There were proposals to do this, using encrypted containers of data that would let users authorize apps to use just the data they needed, but the idea got tied to Web3, which got some intense public blowback between the Crypto and NFT hype cycles.

https://www.w3.org/2023/Talks/0727-wearedevelopers-tbl/solid...

Now we’re onto AI, so we have suboptimal age verification, with implementations in law written by politicians