I am trying to update my Office on my Mac but says I need MacOS 10.14.0 or later but that is not an option in updates

Microsoft now requires macOS 10.14 or later to install Microsoft 365/Office 2019 for Mac. What is the product description line and parenthetical date from the Apple menu : About This Mac panel? That information will determine your Mac upgrade potential.

What year/model computer do you have?

What version of Office are you trying to upgrade from/to?

If you have an iMac Pro as your signature line seems to indicate, it can run anything up to and including Big Sur.

2015