Unable to use "UseNewMappingType" option while creating the OpenSearch Endpoint for DMS in Cloudformation

[Amshee]

I am creating the OpenSearch endpoint via Cloudformation, but need a specific flag set for it to work "UseNewMappingType": true. I can see that this option is available in AWS documentation here, but I can't use that as it is not available in CloudFormation documentation here.

Seems like this needs to be updated in CloudFormation.