This is a Measurement ID, not a Property ID.

Where do I get the GA4 Property ID?

Checkout Journey - GA4 Report        Save in GA4  
Checkout Journey
Create a custom GA4 'Checkout Journey' 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.