Render PowerBI report(PBIX) inside a visual

IMHO you should keep it easy with out of the box Power BI App + Audiences + Workspace Level Security

Create a power bi app with all the reports inside and 2 audiences:
- audience 1: see all reports

- audience 2: see only finance report 

the app can have  RGB theme color and a logo

Workspace access

- add the SME users as contributor role in workspace so they can create reports and add them to the workspace (and to the app if you want)

- add the SME users to the audience 1 so they navigate the app and see all the reports

- add report consumers to the audience 1 and not to the workspace. they won't be able to create new reports just navigate what is exposed by the audience 1 

- add finance consumers to the audience 2 and not to the workspace. they won't be able to create new reports just navigate what is exposed by the audience 2