PBI PRO for outside organization PRO clients

So, I have access to CSV files that I upgrade'em to a SQL server so a PBI can connect, read and generate reports;

I have customers with PBI PRO accounts and they read these reports;

Each report is slightly different from each other which results in a report for each customer;

I've been trying embed this reports in my SharePoint Online both by developing an Add-in and simply by modern page webapp with no success as although the sharepoint let me give access to other organizations to view my page, the power BI doesn't;

I don't want to use PBI embed on demand as my customers does have a PRO account on PBI and it's too much expensive for me right now. I think it's a expense of resources.

There's any way to provide my customers with PBI reports in Sharepoint?

If it's impossible anyone does have any idea to share with me?