You are expecting to create a Dashboard and restrict it to specific business roles, however the option to restrict Dashboard by Business Role is not available when you start a new dashboard.
Cloud for Customer
Reproducing the Issue
Login into the system
Go to Analysis and Dashboard
Click on Add New Dashboard button
In the step 1 of CREATE NEW DASHBOARD screen, note that the following options are NOT available:
• Public: Everyone can see this dashboard
• Custom: Define which roles can see the dashboard
The Business Role assignment option is not enabled to your system in Business Configuration work center, therefore it will not be able to restrict Dashboards by Business Role.
Go into Business Configuration work center and Administrator Analytics Settings, on your current Implementation Project, and make sure the option "Allow Assignment" under "Assignment of Reports to Business Roles" section is enabled.
Dashboard Business Role; Business Role Reports; Restrict Reports by Business Role; Restrict Report; , KBA , AP-RC-ANA , C4C, ByD, Travel: Analytics Tools & Frameworks , How To