Accessing OneNote pages using MSAL/Graph REST API results in error code 403.

Question

Summary:
I have access to OneNote objects via the GRAPH Rest API. Although I am using the same access_token and the same scopes, I am able to access all of my notebooks and sections, but not my pages. Any attempt to access Pages always results in a 403 error.**
Details:**
I am currently developing a OneNote library. This library is intended to provide access to my OneNote Notebooks, Sections, and Pages.

To achieve this, I registered an app in the Azure Portal with the scope "Notes.ReadWrite.All."

In my library, I use the following configuration:

class DefaultConfig:
    CLIENT_ID = "xxx"
    AUTHORITY = "https://login.microsoftonline.com/common"
    SCOPES = [
        "Notes.ReadWrite.All",
        "Notes.Read.All",
        "Notes.Create",
        "User.Read"
    ]
    GRAPH_API_BASE_URL = "https://graph.microsoft.com/v1.0"
    NOTEBOOKS = "/me/onenote/notebooks"
    SECTIONS = "/me/onenote/notebooks/{notebook-id}/sections"
    PAGES = "/me/onenote/sections/{section-id}/pages"

Instead of "v1.0" I also tried "beta". But this didn't change anything.

For authentication, I use the MSAL library:

self.app = msal.PublicClientApplication(
                client_id=config['CLIENT_ID'],
                authority=config['AUTHORITY']
            )
result = self.app.acquire_token_interactive(
                scopes=self.config['SCOPES']
            )

Access to the OneNote objects is done via requests:

headers = {"Authorization": f"Bearer {self.access_token}"}
response = requests.get(url, headers=headers)

The handling is the same for accessing Notebooks, Sections, and Pages. Access to Notebooks and Sections works fine, but for Pages, I consistently receive error code 403.

2025-01-02 11:45:27,866 - ERROR - Request failed for URL https://graph.microsoft.com/v1.0/me/onenote/sections/0-66899B659FC7C342!171123/pages: 403 Client Error: Forbidden for url: https://graph.microsoft.com/v1.0/me/onenote/sections/0-66899B659FC7C342!171123/pages