Bring delayed approvals to owners, flag policy exceptions. Every one is ready to run, and you can adjust it in plain language.
Verify channel membership after each approved access change.
Keep your discussion channels aligned with access reviews, and give reviewers before and after member lists.
Share cleared security incident reports with named outside reviewers.
Your outside reviewer gets a restricted report link and deadline for the incident review. You get a copy of the request or a clear problem to fix.