Yes. Although there isn’t a direct way to achieve the task. You can follow the following workarounds to perform the grant update on an existing subscription.
- Create a new plan with 0$ charge (If you do not have any additional charges for additional grants) and the updated grants amount. Purchase this to a subscriber. This will allocate the additional grants to the subscriber.
- Create a new bundle with additional grants. Cancel the existing bundle and purchase this new bundle.
