The grace period varies depending on when the policy was issued to you.
For monthly mode policies issued after January 2020, the grace period is capped at 15 days. For the remaining modes, the grace period stands at 30 days
For all policies issued prior to January 2020, the grace period is limited to 30 days
Note: In life insurance, the grace period is the specific additional time you get after the premium due date is over to pay the premium and avoid policy lapse.