>which will use digital IDs from Google Wallet to verify user identity and ZKP to verify age
This seems to imply you have to upload your information to Google first. But if you do that then what's the point of ZKP, Google might as well just send over a signed attestation token.
The whole thing is pointless for privacy IMO because it requires a google account, which they can revoke at any time for any reason, not to mention creating one in $this_year already requires way too much personal information.