Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
1
Log into your Microsoft Account on this link, do you find the Office licence/subscription linked to your account there.
https://account.microsoft.com/services/
2
If not, open the Store app, then click Library at the bottom left, is there an 'Included with this device' section and if so, is Office listed there.