Export to excel - Restrict permission

Hi. Tenant settings will let you prevent or allow for a security group. That means the people inside will be able or not for all the developments in the organization.

On the other hand you can prevent export for single report. When developing report you can change report settings yo prevent download.

https://learn.microsoft.com/en-us/power-bi/create-reports/power-bi-report-settings?tabs=powerbi-desktop#open-the-settings-pane

You can do it on service but I would recommend it on Desktop.

I hope that helps,