Warning: if you don't see any data or only a few data is because you don't sign in arcgis online with city account. Most of content are available to city employee only. Public user only can see very limited a few data.
https://data.victorvilleca.gov/
https://opengis-victorville.opendata.arcgis.com/search?collection=appAndMap
https://gis1.victorvilleca.gov/portal/apps/sites/#/covportal
1. where to find open data site on arcgis portal
1.1 click site
1.1.2 click manage site
1.1.3 click site
1.1.4
1.2 content, apps, site
2. How to edit open data home page
https://gis1.victorvilleca.gov/portal/apps/sites/#/covportal/search?collection=Dataset
Victorville open data
1. Home page of arcgis online
https://victorville.maps.arcgis.com/home/index.html
1.2 Open data group at arcgis online
https://victorville.maps.arcgis.com/home/group.html?id=85d47454bd32466dba0a5d28c736f176&view=table&showFilters=false&sortField=title&sortOrder=asc&start=1&num=100#content
1.3 open data site at arcgis online
https://opengis-victorville.opendata.arcgis.com/
1.3.1 all data list, open data site at arcgis online
https://opengis-victorville.opendata.arcgis.com/search
2. Home page of portal enterprise
https://gis1.victorvilleca.gov/portal/home/index.html
2.1 Open data site at portal enterprise
2.2 Open data search data page at portal enterprise
https://gis1.victorvilleca.gov/portal/apps/sites/#/covportal/search
2.3 Gallery page at portal enterprise
https://gis1.victorvilleca.gov/portal/home/gallery.html?sortField=numviews&sortOrder=desc