There are 3 repositories under pentest-report topic.
Offensive Security OSCP, OSWP, OSEP, OSWA, OSWE, OSED, OSMR, OSEE, OSDA Exam and Lab Reporting / Note-Taking Tool
Collection of penetration test reports and pentest report templates. Published by the the best security companies in the world.
PenText system: Easily create beautifully looking penetration test quotes, reports, and documents in many formats (PDF, text, JSON, CSV, ...)
Hack The Box CPTS, CBBH Exam and Lab Reporting / Note-Taking Tool
Penetration Reports
Report template using LaTeX
here are my penetration reports from the machines I've played on.
Ethical hacking pentest report