@Apysert The only way I'm aware that you can access this information is in the O365 audit logs. Which would have needed to have been enabled in order to track this. https://docs.microsoft.com/en-us/power-bi/service-admin-auditing - You would need specific perms to access the audit log and export the CSV, but I know the information is in there.
I am not aware of anything that would let you access that retroactively for everything. You could see all the reports in a particular workspace, and that is out of the box from the service by just removing the fliter. We have that walkthrough on powerbi.tips -> https://powerbi.tips/2017/11/custom-usage-metrics-reporting/
I am trying to find a solution regarding the GRPD reglementation through the use of data in Power BI.
what kind of data are used ? what is the name of objects used in power Bi model ? which report is linked to which model, which user have access to which reports....?
I'll keep you informed if I have some news to share.