Validate the roles within Power BI Desktop
After you've created your roles, test the results of the roles within Power BI Desktop. From the Modeling tab, select View as.

Select a role you created, and then select OK to apply that role. The report renders the data relevant for that role.

Select OK. The report renders based on what that user can see.
Reference:
https://docs.microsoft.com/en-us/power-bi/admin/service-admin-rls