Also having the same problem accessing Onedrive website specifically. I can still access other MS services like Outlook, calendar, office etc. It is only Onedrive that fails to connect.
I can access the product page at https://www.microsoft.com/en-au/microsoft-365/onedrive/online-cloud-storage but attempting to access via sign in or through the OP’s links it leads to ‘infinite loading’ on an about:blank page.
No active extensions / ad blockers.
In the past I had similar Onedrive loading issues but eventually I could refresh and the page would load. Now it has stopped loading even after leaving the tab open for hours.
I tested the using Vivaldi browser and the links work successfully.
System:
Windows 10 Pro
Version 2009
Build # 19045.5965
Brave:
1.79.123 (Official Build) (64-bit)
Chromium: 137.0.7151.104