Someone made a compilation of academic reviews and blogposts here: https://community.signalusers.org/t/wiki-overview-of-third-party-security-audits/13243 but none of them seem to be real security audit reports, ex. compare with real security audits to Delta Chat: https://delta.chat/en/help#security-audits
This seems to be the latest one. https://simplex.chat/blog/20241014-simplex-network-v6-1-security-review-better-calls-user-experience.html