SharePoint Online: Get content from default Document Library via graph API fails

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Developer environment

None

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

Describe the bug / error

Since today I have multiple customers reporting an error when trying to resolve the default Document Library's content using the Graph API. As of this morning, this is apparently only functional for some users.
This appears to be a breaking change that has been released in to SharePoint Online live and affecting more tenants as the change is rolled out.

Steps to reproduce

1. Open Microsoft Edge
2. Sign in to SPO site default document library

3. Using Graph Explorer shows no content

• https://graph.microsoft.com/v1.0/sites/TenantName.sharepoint.com:/sites/SiteName:/drive/root?$select=name

Expected behavior

The API should return correctly the content of the default document library.