Request missing approval evidence, route requests to reviewers. Every one is ready to run, and you can adjust it in plain language.
Apply document control rules to changed manuals before review.
Your document review and approval process has a clear next step: a linked task with the changes and prior decision for the revised manual.
Open a review naming the sign-offs a revised SOP needs.
Your quality manager gets a linked SOP review showing the new step and required sign-offs before the revised procedure can be released.