How to view and debug GTM configurations in GA App+ Web DebugView panel?

In Google Analytics: App + Web Event tag, add a new parameter and insert parameter name as ‘debug_mode’ and value as GTM inbuilt variable {{Debug Mode}}. Save changes and click ‘Preview’. GTM will show a banner across the top of the workspace overview page to indicate that Preview Mode is active.

Once Preview Mode is enabled, navigate to the site where the container is implemented. Refresh the page if needed. Now you can view events in real-time in GA App+ Web DebugView panel.