Hello.

As @Tanushree Maiti already mentioned.

• Major Incidents Excluded: Some systems are configured to exclude "Major Incidents" from automatic closure rules, requiring manual closure.
  
  Verify once incidents are major incidents which is not moving.
  
  Refer below KB-KB0785420 
  
   Major incidents are not CLOSED by the system even after 7 days - Support and Troubleshooting
  
  Please mark this response as Helpful & Accept it as solution if it assisted you with your question.