Solution for hosting Power BI report

For Basic protection you may opt for Embedded with Gnerate Iframe embed option and put those in any web portal . The users would have to login to access those reports. The external users can be added as guests to your tenant. You may skip Publish to web as that is not recommended for any client specific usage.

 Here is the link with details :

https://docs.microsoft.com/en-us/power-bi/collaborate-share/service-embed-secure#:~:text=and%20JavaScript%20knowledge.-,How%20to%20embed%20Power%20BI%20reports%20into%20portals,or%20website%20in%20an%20iFrame.