Would you be willing to confirm your phone number with Warpcast via SMS (wouldn't be publicly visible):

1. Gave you an algo boost
2. You could see other users verified by Warpcast

If it was the only option, and there was no ZK wrapper etc, then I would likely refuse out of principle.

Is there an open source reference implementation of a zk wrapper?

https://passport.gitcoin.co/

Good start. I would like to see a simple circom circuit that allows you to get an EAS of XX using ZKPs from a gitcoin passport since AFAIK passport still issues the VC in a publicly viewable way.