Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
At the top left of your Mac desktop, click the Apple icon and select 'About this Mac', what version of MacOS is installed on your computer?
2
Open Word.
On the top menu, select Word - About Word.
On the resulting dialog, in the 'Belongs To' section should be the Email address used for the Office apps, note that down.
Then log into that Microsoft account on this link (https://account.microsoft.com/services/), check the expiry date on your subscription, does that indicate your new subscription has been successful?