Track AWS Connect calls which hang up before reaching a queue

Yes, you can use the historical "Phone numbers" report, you will see all the phone numbers shows up as the first column. Make sure to include the following metric:

Contacts incoming

Contacts queued

Contacts incoming is the total number of calls the phone number answered, and Contacts queued should be a smaller number which are the calls that went into queue. The difference will be how many calls did NOT go into a queue.