Some bulk actions like Workflow (Submit, Approve, etc.), Delete, and Update Rates are intentionally grayed out in the Actions menu on Core screens when you use 'Select All'. Allowing batch actions on a large record set can lead to performance issues and that is why it is not allowed by Core. As an example, the Submit or Approve action triggers multiple actions on the web server like push notifications to mobile, emails, and other notifications. This can cause problems and that is why those actions are disabled in case of Select All.