Not me, but someone on the signal forums helpfully compiled many of them; there are a lot more than I thought! https://community.signalusers.org/t/wiki-overview-of-third-party-security-audits/13243
ok I read it, these are no real security audits but academic reviews of protocol properties etc.
If what you want is encrypted email, and see it in the form of a chat, take a look at ArcaneChat