I defined a calendar in a test solution on my Mac.  Looks great.  On the iPad Pro, the calendar does appear in the layout, but tapping on an event (that was defined as editable when I created an event on the Mac) does nothing.  Am. I missing something?

Okay, after much experimentation, I figured it out.  You must tap and hold finger on an event, and hold, and hold.  The Event pane eventually appears.

Oh Awesome! Glad you figured it out. I actually didn't know that  about the add-on. Great discovery.