Service in Cloud Foundry Environment - additional provider charges?

Dear Community,

I have a question regarding the emphasis on iaaS providers for SAP Cloud Foundry environment, but i can't find a clear answer.

If I subscribe to an SAP Cloud Foundry environment based service, do I have to pay additional costs for the IaaS provider or is everything covered by the SAP service fee?

I appreciate any answers or references to relevant information.

Best regards, Stephan