How to undo a update done 2/24/20

If you do not want to update your software or your macOS, you can revert from your backups:

Revert your Mac to a previous macOS version - Apple Support

With the release of macOS 10.15 Catalina, applications will have to be 64-bit. App developers will issue updated apps if they want their apps to work on this newest macOS upgrade

32-bit app compatibility with macOS ... - Apple Support

https://support.apple.com/en-us/HT208436

Office for Mac running macOS Catalina

If you have Office 2011 for Mac or before WILL NOT run.

Office 2016 for Mac needs to be v15.35 or later.

Update the software or try an alternative for word documents—

https://docs.microsoft.com/en-us/officeupdates/update-history-office-for-mac


The current Office for Mac; Office 365 or Office 2019 (One-time purchase) are OK with Catalina

https://support.office.com/en-us/article/how-do-i-upgrade-office-ee68f6cf-422f-464a-82ec-385f65391350

https://products.office.com/en-us/compare-all-microsoft-office-products?&activetab=tab:primaryr1

Reinstall Office. You cannot "undo" a macOS update or upgrade. You must first erase the drive, then install the version of macOS you want. Then you will lose everything.

Were your Office apps in the Applications folder where they are installed? Have you looked there? Or, did you install them in some other location? Have you tried searching for them with Spotlight?

If it's because you had a version of Microsoft Office prior to the 2016 version, you either have to do as Happy said or buy the newer version of Microsoft Office and install that instead.