Disk Storage: Dependency Issue Preventing Resource Deletion — Managed Disk No Longer Visible in Portal

Question

Problem description

I am unable to delete all resources related to my Azure environment because a managed disk that was previously attached to a virtual machine still appears to be in use, even though it has since been deleted and shows a 404 error when attempting to access. Attempts to remove the disk and associated resources fail with errors indicating a dependency or resource in use.

All resources except for this disk, its restore point collection, and that collection's resource group have been successfully deleted.

Environment

Azure Disk Storage in Australia East region, involving a managed disk, backup restore points in a Recovery Services vault, and related VM resources.

What I've already tried

I have tried deleting the resource directly, via the portal and powershell. I have checked for soft-delete and SAS permissions. I have attempted to force-delete the disk but as there is no disk to delete it has been unsuccessful.

Current status

I am seeking assistance to identify the lingering dependency preventing resource deletion and to perform a force delete of all related resources to free my account and continue my studies.