Currently we don't have such functionality where you can bifurcate the same. Basically, we don't mark the sequences as finished because you can always keep adding prospects in the sequence and keep your outreach going on.
But, in order to check if all the present prospects have completed sending or not, you can check the "Prospects" tab of the sequence and check the numbers in "Not contacted"
If there are any prospects who should receive the emails but have not contacted yet, the sequence is still running.
The prospects which are not contacted are the risky prospects.
Basically by default, Saleshandy won't send emails to the risky prospects as there are high chances of receiving bounces from there.
If you want to send emails to the risky prospects, you can enable the option from the sequence settings: