To enable the export to PDF option for your embedded QuickSight dashboard, you need to specifically enable the ‘export’ feature in your embedding configuration. When embedding a dashboard using the RegisteredUser API, you can add the ‘export’ option under toolbarOptions in the embedding SDK. Refer here
This option is disabled by default, so you must explicitly enable it.
The implementation would look similar to this in your embedding code:
Once implemented, users will see the export option in the toolbar of your embedded dashboard, allowing them to download the current sheet as a PDF. Refer here
The PDF export provides a snapshot of the dashboard sheet as it appears on-screen at the time of download.