Github will block out the approval button in file changes > review changes. Even if your an admin, however it is documented (https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/approving-a-pull-request-with-required-reviews)
"The Request changes option is purely informational and will not prevent merging unless a ruleset or classic branch protection rule is configured with the "require a pull request" option."
So checking back in the ruleset the user needs to be added to the Bypass List, (ie. as repository admin).
"Repository owners and administrators can merge a pull request even if it hasn't received an approving review, or if a reviewer who requested changes has left the organization or is unavailable."
Then we have the following option available within the Pull Requests tab at the bottom.
Make sure the box is checked next to "merge without waiting.." and the merge can be completed without further actions.
Thus changing of reviewer amount is no longer needed.