ION was very promising,

https://github.com/decentralized-identity/ion

As well as Web3ID

There are also other projects that use ZKPs (Zero-Knowledge proofs ) , I’m aware of

https://github.com/zkpassport

https://github.com/0xPolygonID

And this type of tech it *can* be deployed now, as demonstrated by google wallet:

https://www.coindesk.com/markets/2025/05/02/google-adds-zero-knowledge-proofs-to-wallet-for-age-verification