In CRM Analytics, even if users are granted access to view an app and its dashboards, their ability to download data is controlled by permissions assigned via permission sets. Specifically, users need the
"Download Data" permission to download data from widgets or dashboards. If this permission is missing from their permission set, they will be unable to download the specific widget, even though they can view the data.
Reference: The role of permission sets in granting access to data features, such as downloading data, is detailed in Salesforce'sCRM Analyticspermissions documentation and is emphasized in the module "Building Lenses, Dashboards, and Apps in CRM Analytics."