Good evening Mark and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with this topic.
Based on what I am seeing the issue is that the sidebar (widget area) is actually located in the same VC row as the event.
The safest way to get this to display differently on mobile would be to:
- Hide that sidebar completely with CSS for mobile devices
- Create a new sidebar area below the details and map that would be hidden by default but only displayed on mobile still using CSS
Let me know if that helps.
Have a great day!
Geoff B.