IAC – Unable to expose direct ScreenFlow for an existing wok object

Issue 1: We need to display the first assignment of a ScreenFlow which is referred in Main flow for an existing Work Object

The WO has been traversed out of the screenflow. In this stage we need to expose the Pega screen through IAC and display screenflow directly without any intermediate screen.

Issue 2:

We need to expose only one assignment of the screenflow through IAC

Please suggest/advice if anybody has implemented above scenarios.