Power BI dashboards and reports come with a usage metric so you can see how users used this content. There is another usage metric across the tenant, if you have access to a Power BI admin account, you can see it under the Admin portal of the Power BI service.
If you want to create your own detailed usage metrics reports across your entire tenant, you might consider extracting activity logs or audit logs, export them to text files, and creating Power BI reports from them.
You can refer to below tutorials.
Track user activities in Power BI
How to view the frequency of user usage for all workspaces in Power BI
Community Support Team _ Eason