Explanation
Box 1: Service Request 1:N Qualification
When users go on vacation, all their outstanding Service Request records are assigned to a substitute employee. The substitute employees are unable to see all the qualifications related to their service requests.
Box 2: Cascade All
Cascade All - Perform the action on all referencing table records associated with the referenced table record.
Reference:
https://docs.microsoft.com/en-us/power-apps/developer/data-platform/configure-entity-relationship-cascading-be