The message says that the developer of this app needs to update it to work with this version of macOS (Catalina 10.15.7). Contact developer for more information
That sounds like you have Office 2011 or older which, being 32-bit apps, cannot run on any macOS higher than 10.14 "Mojave." You need an updated Office 2016 or a newer version to run on Catalina of higher.
Whether you can run Office at all depends on your Macbook Pro's SUB-MODEL from "About this Mac...":

If you tell us your SUB-MODEL we can better advise you on how to proceed.
MS will only activate a new install of Office on Macs running the current and past two macOS versions. Today that is Sonoma macOS 14; Ventura macOS 13; and Monterey macOS 12. With a week or two, Monterey will fall off the list when Apple releases Sequoia macOS 15.
If your Macbook Pro cannot run those OS versions, you can no longer install Office. You will nee dot look at productivity suite option lte the open-source LibreOffice.
https://www.libreoffice.org/discover/libreoffice/