I can't restrict admins to merge without review using protected branch

I am trying to restrict admins to merge pull requests without a review of approval. However, when I checked, the merge button was still green in colour. What should I do?

Hell @ryantwt07 and welcome to the community!

This can be a little tricky to troubleshoot without having access to your repository.
However, this may come down to the branch protection rule settings.

Please make sure that “Include administrators” has been checked in your branch protection rules.