You might look at the
Quality check Plugin: Check Metadata: Check Series Gaps.
This is a Log report (copy to clipboard)' You would need to parse it outside of Calibre and the import (Import List Plugin? ) (It does designate Last: # )
Code:
Series: Bookworm - Author: Christopher G. Nuttall - Last: #4
Missing#: 1,2

But this only tells you WHAT IS IN the Library and NOT what the actual series has a volumes.