Hello @Dennes Torres ,
At this time, Power BI App for Cost Management supports only customer's with an Enterprise Agreement.
The feature owners are actively considering expanding support to non EA customers but no definitive timeline to share at this time.
Please note: Cost Managment supports custom cost views and visualizations that may meet your immediate business needs.
Dont hesitate to reply if there is a specific reporting/visualization query we can help with.
Hope this helps.