Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Where do you see the suggestion to renew? If it is in your account at https://account.microsoft.com, then it is an offer (basically an ad) from Microsoft wanting you to subscribe, and these offers are especially frequent if you have subscribed in the past.
On the other hand, if the Office apps report that they are unlicensed, that issue must be dealt with, of course. What do you see when you look at File > Account in Word, for example? Do you see any signs that Office is unlicensed?