given a dashboard app, how to know what webmap it use

Question

I want to  track down what web map this dashboard app use.  

https://gis1.victorvilleca.gov/portal/apps/opsdashboard/index.html#/3cfe3023d0ba40749cf6f46131a59edc?mode=edit

 

Step 1. 

 

 

Step 2.

 

 

Step 3.

 

Step 4.