Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Mine has been broken for weeks now, I can't access my subscriptions page no matter what browser or device I try.
Mine is also broken still!
Not a solution but a slight workaround.
If you sign in to Windows (mine is Windows 11 if it matters) using your Microsoft account which has subscription. In Settings > Account Info you can see your M365 subscriptions and its expiry date. Also your xbox game pass subscription.
Anything more takes you to the webpage and that is broken.
Hoping this helps someone. I figured it out after weeks of trying in different browsers in different devices.