Is there a email merge field for last feed item comment?

We want to send an email to a case contact when an agent posts an update to their case using the Post action. We want the email to contain the body of the post the agent made.

There is an email merge field called !Case.Last_Case_Comment__c. However the Post action creates a feed item not a case comment.

Is there a similar merge field for a feed item post? For example, if an agent uses the Post action in Service Console.