Hi Team,
Please provide the getRFCID() on the compose view and message view, as it can be useful to consider rfcID as a uniqueId instead of messageId and threadId, as they're very much particular to User.
I've checked the platform-implementation.js file source code (which is minified), the rfcID is already available in the model. It would be helpful for us, if it can be exposed through an API. Please check the below attachment.

Thank you.