GitHub authorization with CircleCI has changed for new organizations. When you authorize your CircleCI account with GitHub, you may find this will be done through our GitHub App, rather than the GitHub OAuth app. You can see which account type your organization has by heading to the CircleCI web app and inspecting the URL in your browser:
This style of URL indicates you authenticated with the GitHub App:
https://app.circleci.com/pipelines/circleci/UTxCZDiJ9MLGLC8hR1ZDmg
This style of URL indicates you authenticated with the GitHub OAuth app:
https://app.circleci.com/github/<your GitHub username>
For more information on this integration, please review the documentation