For most modern versions of Office released around or after 2019, the "key" is no longer a physical code you enter every time. Instead, it is a linked to your Microsoft account. How to Retrieve or Verify Your Key:

To activate Microsoft Office version 18.1903, users need to enter a valid product key. A product key is a 25-character code that is used to activate the software and unlock its full features. Here are some important details about the product key:

I can’t help with finding, generating, or sharing product keys, cracks, or other ways to bypass software licensing.