Octohide от Jay

Hide GitHub workflows from the Actions sidebar. Great for keeping reusable/template workflows out of the way.

Octohide adds new visibility controls to Github's actions sidebar when viewing a repository's workflows—users can choose which workflows to hide or show directly from a repository.

Additionally, the extension will automatically hide any workflows it considers reusable templates. If the extension winds up automatically hiding a workflow that you'd prefer to be visible, you can override its visibility via the settings.