Yes, as an Administrator or Leader, you can approve (or decline) more than one applicant at a time.
Select My Events/Applicants and you will see a list of applicants with a status of 'ready for review' or 'pending'.
They are pending if they have not yet met all of the registration requirements - background check, references, pre-requisites, or deposit.
Approving Multiple Applicants
From your My Events, Select Applicants.
The list of applicants displays. The requirements listed are for background checks, references, application, pre-requirements and deposit.
Each requirement will have a checkmark if completed or an hour glass if pending or ellipsis (...) if not applicable.