We are looking to test whether the widgets in our app are inserting into the smart stack when the widget suggestion was enabled.
We have enabled the "Intent is eligible for widgets" and "Intent is eligible for Siri Suggestions" in the widget's Intent definition file as suggested and donated the intents to the system(tried both INInteraction and INRelevantShortcut).
Also, we have enabled the "WidgetKit Development Mode" in the device Developer settings. But still, the widget is not inserted into the stack.
Note: We have tried this in Xcode 13 beta 3 (with iOS 15.0 beta 3).