This issue can happen if you haven't recently pushed any commits to your Default Branch or if your Default Branch has changed since being added to Codecov.

The coverage timeline graph will only show commits on the Default Branch. Therefore if you use a feature or development branch, the coverage may appear out of date.

To confirm that Codecov has the correct branch set, you can visit the Repository's Settings page and check under the Default Branch section to make sure the Branch Name is updated.