When we trying to deploy flow with action button using CI/CD we get an error:
The "Request_TCO" action button doesn't exist on the same screen as the specified screen action and trigger.
-ensure that the button (Request_TCO) is added to the Flow Screen in the UI
-ensure the flow screen has an action, like a button, and is correctly linked to the action trigger
-confirm that both the flow and any related action button are included in the deployment
-verify Action Button in Lightning App Builder: If its part of a Record Page or App Page, ensure he button is part of the page layout or component and is being deployed
if the same issue still persist, I would suggest deploying/validating it using changeSet or other tools you have. if its successful then I guess you have missing on your CI/CD