I am using the serverless framework and cannot deploy because I have more than 500 resources which is the CloudFormation limit. I am using the split-stack plugin, but it is still failing. Any help would be appreciated. It puts most of the resources in root. This is the start of my serverless.yaml file:

  splitStacks:
    perFunction: true
    perType: true
    maxStackResources: 200
    nestedStacks:
      CustomResourcesStack:
        resources:
          - ElastiCacheSubnetGroup
          - ElastiCacheCluster
          - GatewayResponseDefault4XX
          - SesTemplate
          - CognitoUserPool
          - CognitoUserPoolClient
          - ApiGatewayAuthorizer
          - CognitoIdentityPool
          - CognitoIdentityPoolRoles
          - CognitoAuthRole
          - GoogleUserPoolIdentityProvider
      DMSStack:
        resources:
          - DmsMigrationDocdbToOpensearch
          - DmsOpenSearchEndpoint
          - DmsDocumentDbEndpoint
          - MyDmsReplicationSubnetGroup
          - DmsInstance
      OpenSearchStack:
        resources:
          - OpenSearchDomain
          - OpenSearchRole
      SchedulerStack:
        resources:
          - SchedulerRole
          - JobScheduleGroup
          - AssetsScheduleGroup
          - AssetIndexesScheduleGroup
      S3Stack:
        resources:
          - TemplatesBucket
          - ImagesBucket
          - BucketPolicy
          - RealtorsBucket
          - RealtorsBucketPolicy
      ElastiCacheStack:
        resources:
          - ElastiCacheSubnetGroup
          - ElastiCacheCluster
      ApiGatewayStack:
        resources:.....

this is the output:

Packaging hamlethub for stage dev (us-east-1)
Creating Swagger file...
[serverless-plugin-split-stacks]: Summary: 215 resources migrated into 14 nested stacks
[serverless-plugin-split-stacks]: ├─ (root): 536   
[serverless-plugin-split-stacks]: │  ├─ Outputs: 31
[serverless-plugin-split-stacks]: │  └─ Parameters: 0 (References: 618)
[serverless-plugin-split-stacks]: ├─ APINestedStack: 98
[serverless-plugin-split-stacks]: │  ├─ Outputs: 78
[serverless-plugin-split-stacks]: │  └─ Parameters: 0 (References: 194)
[serverless-plugin-split-stacks]: ├─ AddAssetNestedStack: 1
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ AlarmsNestedStack: 2
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ ApproveSuggestionNestedStack: 1
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ CropImageNestedStack: 1
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ DeleteUserNestedStack: 1
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ ManageSuggestionsNestedStack: 1
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ PermissionsNestedStack: 99
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 102 (References: 0)
[serverless-plugin-split-stacks]: ├─ PoliciesNestedStack: 3
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ RepostAssetNestedStack: 1
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ SearchHubNestedStack: 2
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ SubscribeHubNestedStack: 1
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: ├─ SubscriptionsNestedStack: 3
[serverless-plugin-split-stacks]: │  ├─ Outputs: 0
[serverless-plugin-split-stacks]: │  └─ Parameters: 1 (References: 0)
[serverless-plugin-split-stacks]: └─ UnsubscribeHubNestedStack: 1
[serverless-plugin-split-stacks]:    ├─ Outputs: 0
[serverless-plugin-split-stacks]:    └─ Parameters: 1 (References: 0)

✔ Service packaged (217s)

I have tried multiple tags with split-stacks, but it always puts too many resources in the root