You must see this page on the ‘Query Browser’ app and this is the place to look for standard CDS views for different SAP functional modules. If you can not see this app, make sure you have this role assigned to your user: SAP_BR_EMPLOYEE. Login to the Fiori launchpad to find the app. Another way which I also rely on is the ‘Query Browser’ app on ‘Fiori Launchpad’.
For attention of BW consultant, it is kind of similar to SAP standard BW content which is delivered by SAP for each module and can be leveraged to create complex analytics. SAP has delivered standard CDS views to create S4 Real Time Analytics and this is also called S4 or S4HANA Embedded Analytics.