As mentioned in the docs (See below) metered APIs and services in Microsoft Graph that consumes the APIs must be associated with an Azure subscription. This subscription will be billed for any metered charges.
https://learn.microsoft.com/en-us/microsoft-365/enterprise/subscriptions-licenses-accounts-and-tenants-for-microsoft-cloud-offerings?view=o365-worldwide#subscriptions
See the article for Creating/Adding Enterprise and Organization Azure Dev/Test Subscriptions
https://learn.microsoft.com/en-us/azure/devtest/offer/quickstart-create-enterprise-devtest-subscriptions
Further note billing model available:
https://learn.microsoft.com/en-us/graph/teams-licenses#payment-models
For additional aid in Azure billing setup please open a case with Azure support:
https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request
For requesting to update doc pages please refer to bottom of page in doc and in the "Submit and view feedback for" section click "This page" for GitHub review request.
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