Can't update Landing Zone-managed SCPs with the bulk policy migrator scripts

The LZ solution deployed is already on the latest version 3.2. The SCPs managed by the Landing Zone solution appear to be very long already. The bulk policy migrator scripts (https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/migrate-iam-permissions.html) work by appending fine-grained permissions, so it returns the error below when the script attempts to update the policies.

An error occurred (ConstraintViolationException) when calling the UpdatePolicy operation: You have exceeded the maximum policy size.

Is there any official update from the Landing Zone solution that uses the new fine-grained actions as documented in https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/migrate-granularaccess-whatis.html?