Right now the Export option in table charts (by clicking the 3 vertical dots) is only available/visible to users with Editor access. How can I make it available to users with Viewer access - how can a user who has Viewer access download the content of the table chart to CSV/google sheets?
It may be that the report has been set to disallow export access. See here for more info: Stop sharing your reports and data sources | Looker Studio | Google Cloud
(Note: if export is allowed, a user can also right-click on the table/chart to export, in addition to using the 3 dots.)