Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Based on my research, I found an official article that addresses this situation: No subscriptions found error - Azure portal sign in - Microsoft Cost Management | Microsoft Learn
You may try following the guidance provided below:
If the guidance does not help resolve the issue, I would recommend reaching out to the Microsoft Support team for further assistance. As this is a user-to-user support forum, moderators and community members do not have access to the internal tools and resources required to investigate subscription related issues in greater detail.
You can create a support request using the following link: https://go.microsoft.com/fwlink/?linkid=2083458
I hope this provides some additional insight.
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