Hi, I am Dave, I will help you with this.
Windows never comes with an Office licence included, they are two separate licences.
1
Download the free ShowKeyPlus app from the Microsoft Store.
Please provide a screenshot of that app window and please hide any product key that may appear in the screenshot.
2
Log into your Microsoft account on this link, do you see any previous Office licence listed there apart from your current Microsoft 365 subscription?