Hi
If you are publishing your report to Power BI Online, then there is a share option available.
This allows you to enter the email of the person or people you'd like to share with and they will then get a notification.
Some more information is available here
I believe the ability to send notifications when a report has been refreshed via a schedule or automatically send a PDF is possibly on the roadmap. There are a couple of posts in the Ideas list. Might be worth voting on this requirement if it is important to you.