It is supposed to work, if you have everything configured right with Mx Model Reflection. Cannot decide what’s wrong without seeing it. But there is another easy way to do it within microflow. copy the HTML code to a text variable and when you create a new email set the body of the email as HTML body and you could replace the values within the microflow without any need of tokens. In this case you have to retrive the email template and use it in microflow.