Hello Thank you for reaching out. I would like to confirm that you can register for Azure Resource providers for your subscription using steps listed below:
- Browse to following link for your Azure Portal: https://portal.azure.com/#view/Microsoft_Azure_Resources/RPStatus.ReactView
- Select the affected subscription.
- Search for the required resource provider.
- Select the resource provider from the list and click on Register.
- Documentation Link: Register Azure Resource Provider
- Please find below screenshot for reference.
I hope this answer helps to resolve your issue. Please "Accept the answer" if the information helped you. This will help us and others in the community as well