A follow-up Task is created.

The actions described require an after-save record-triggered flow because the automation must create additional Salesforce records and invoke a notification action after the triggering Case is saved. Salesforce explains that after-save flows handle actions dependent on a successfully saved record, including creating records, updating related records, sending emails, and other actions. The Send Custom Notification core action is also directly available in Flow Builder. A before-save flow is optimized for changing or validating fields on the triggering record and does not support this full set of post-save operations. A Screen Flow would unnecessarily require user interaction, while a platform event-triggered flow requires a platform event rather than a Case record change. Therefore, Actions and Related Records after save is the appropriate architecture.

================