Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Are you using it on Windows 11, or macOS? If macOS, which version?
Are the apps currently installed? If so, is there a banner that has a button "enable content"? If so, click on that and it should work.
Otherwise, tell me, are the apps even installed? Or installed, but it won't allow you to make any changes?
If you go to your account https://account.live.com > Subscriptions, what's the full name of the subscription?