@OBreena Smith
As above description, if you are using the Google Chrome OS for your Chromebook. You need to use the Android version of Office which download from Google Play.
Here are Capabilities per supported operating systems (OS) and platforms for Office product.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.