This article explains that custom rate limit increases for Fine-Grained Authorization (FGA) are exclusively available to FGA Enterprise subscription plans.

• Fine-Grained Authorization (FGA)

• FGA Enterprise subscription plans

The ability to increase rate limits is a feature exclusive to FGA Enterprise subscription plans and is not available for accounts on the Free Trial.

For Enterprise customers, requests for higher rate limits can be made through the Account Executive. While these limits can be raised to accommodate specific needs, they cannot be made infinite. More details about FGA subscription plans and rate limits are available in the following document: FGA Subscription Plans.