How do you prove what changed in a regulated workflow?

I am trying to solve some real problems. But i need real usage pain points and workflow information. I’m trying to understand how security teams in regulated or high‑risk environments handle proving what changed in a workflow and when. In practice, logs, Git history, and internal systems don’t always give a tamper‑evident or review‑ready trail. For those of you who deal with audits or incident reviews, where do the biggest gaps show up when you need to prove the exact state of something at a specific moment? Do you have a simple system for you to produce the desired reports?