Dynamic content not available in Power Automate

Scenario

After I added a "Post adaptive card and wait for a response" action the dynamic content of that action was not available to select from.

The adaptive card asks for an approval using this code:

{

   "type": "ActionSet",

   "actions": [

   {

      "type": "Action.Submit",

      "title": "Approve",

      "id": "Approve"

   },

   {

      "type": "Action.Submit",

      "title": "Reject",

      "id": "Reject"

   }

   ]

}

If you want to know more about adaptive cards and how to format them, go here!

After that the submitActionId was not available in the dynamic content. To find out what dynamic content you need in subsequent actions just test your flow and check the output of the "Post adaptive card and wait for a response" action.

To use outcomes from the previous action is manually entered the folowing expression:

outputs('Post_adaptive_card_and_wait_for_a_response')?['body/submitActionId']