FIPS compliance

Reading this Vault Compliance I understand that vault is FIPS compliant.
It’s this certification only for Vault Enterprise or the open-source version is covered too?

This presentation & demo might address your question, at least in parts:

Achieving FIPS 140-2 Compliance with HashiCorp Vault
May 26, 2021

What about building Vault using boringcrypto to achieve FIPS 140-2 level 1 compliance?

So far it builds, and seems to be linked to boringSSL.