Create cost anomaly subscription with percentage threshold with CloudFormation

I'm trying to create "AWS::CE::AnomalySubscription" with percentage threshold (not dollars) but it fails with "Properties validation failed for resource CostAnomalySubscription with message: #: required key [Threshold] not found #: extraneous key [ThresholdExpression] is not permitted" ThresHold only allows dollar value, not percentage. I want to define percentage value.

By looking at the documentation at https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ce-anomalysubscription.html it says that ThresholdExpression should be used and Threshold is deprecated.

A snippet from my template in yaml: CostAnomalySubscription: Type: 'AWS::CE::AnomalySubscription' Properties: SubscriptionName: "MySubscription" ThresholdExpression: - '{ "Dimensions": { "Key": "ANOMALY_TOTAL_IMPACT_PERCENTAGE", "MatchOptions": [ "GREATER_THAN_OR_EQUAL" ], "Values": [ "10" ] } }' Frequency: "DAILY" MonitorArnList: [ !Ref CostAnomalyServiceMonitor ] Subscribers: [ { "Type": "EMAIL", "Address": "abc@def.com" } ]

To me it seems currently this is not possible using CloudFormation. When will it be? And how long it takes for AWS to NOT release anything until it's fully supported by CloudFormation or at least get the documentation right.

From documentation:

Threshold (deprecated)

The dollar value that triggers a notification if the threshold is exceeded.

This field has been deprecated. To specify a threshold, use ThresholdExpression. Continued use of Threshold will be treated as shorthand syntax for a ThresholdExpression.

One of Threshold or ThresholdExpression is required for this resource.

Required: Yes

Type: Double

Update requires: No interruption