Reza Rad looks at Power BI Embedded:
Power BI Embedded is the reporting and analysis solution for mobile and web applications. Power BI Embedded is an Azure service that integrates Power BI solution into mobile and web applications. The report still has to be authored and created in Power BI Desktop. After creating the report it can be published into Power BI workspace in Azure, and using API Keys of Power BI workspace and embedding Power BI report frame into the web/mobile application it will be integrated into the application.
Reza walks through the process step-by-step. The upshot is that you can take this report you created in Power BI and embed it into your own application, where you can apply your own in-app access controls. There are limitations, which Reza spells out at the end of the post, so check it out.