How to add any specific team as code reviewer
You just need to create one file CODEOWNERS at below location.
- .github/CODEOWNERS
- docs/CODEOWNERS
- Root: CODEOWNERS
Like below
# Set code owners for the entire repo* @your-org/devops-team# Set different owners for a specific folder/docs/ @your-org/docs-team# Specific file ownerREADME.md @your-org/techlead
then set protection rule – Require review from Code Owners

Now when any one raise pull request, it will ask for approval from group you have added in Codeowner file.
add