Understanding the condition of Pola's crew after boarding

Could the Royal Navy boarding parties have understood why Pola's crew were drunk and disorderly if they had had time to assess the situation?

Probably, if they had the time and wanted to examine the circumstances.

A fuller assessment could probably have explained the crew's condition. That judgment depends on the boarding parties having both the time and the willingness to investigate; it does not establish that such an assessment occurred.