Hi there. For this, one equivalent way that I found was to do the following:
Create the widget component using the Add Widget Component (as you’ve done above. I’ve stored mine in an actor that I called WidgetForUI). Afterwards, I used the [Create Widget] node to create a new widget of a class.
Once this is done, you can set the widget you wish to use by grabbing the widget component and using the function [Set Widget]. From there I set the draw size.