AWS Openseaarch Support for cold_migration and cold_delete

Hi,

The AWS docs at https://docs.aws.amazon.com/opensearch-service/latest/developerguide/ism.html#:~:text=OpenSearch%20Service%20supports%20three%20unique%20ISM%20operations%2C%20warm_migration%2C%20cold_migration%2C%20and%20cold_delete state there are 3 special actions supported by ISM for Amazon OpenSearch Service:

OpenSearch Service supports three unique ISM operations, warm_migration, cold_migration, and cold_delete.

However, I can only see warm_migration in the OpenSearch Policy Management Visual Editor. See https://imgur.com/a/kzZscks

If I use the API to create a policy including cold_migration and cold_delete, it succeeds, but I can't view it in the UI. So I am unsure if this is really supported, or if the UI hasn't been updated to reflect this.

Curious to hear others thoughts on this.