EWS candidates do not get a separate age relaxation.
The 10 percent EWS quota is about reservation in posts, not about age limits.
Age relaxation in bank exams applies to SC, ST, OBC, PwBD, ex-servicemen and other listed categories.
An EWS candidate who also belongs to one of these categories claims relaxation under that category.
Check the age-relaxation table in the official IBPS notification.