I'm a pro user and I've been doing several test using Power BI Reports in Sharepoint.
It seems that you must be a member of the workplace where the original report is publish in order to see it correctly in the Sharepoint site.
Im I right?
We tried publishing in a public workspace but it was the same. We can't see it.
If this is the case, the sharepoint option only would work with pro users as you need to be a member of a workspace and the only way is to have a pro license.