This is a Measurement ID, not a Property ID.

Where do I get the GA4 Property ID?

Exit Pages - GA4 Report        Save in GA4  
Exit Pages
Create a custom GA4 'Exit Pages' report and save to your GA4 library. It's the easiest way to create multiple reports across GA4 properties.

GA4Builder only works on desktop, so please come back on a desktop computer to create reports.