Hello,
you can use a firebase AI2 component or the Web component to interact with firebase:
METRIC RAT AI2 - Firebase Demo: No Security with Web Component
Once you have the data in your app, you can display it in a table using tableview extension:
[FREE] TableViewer - fully style customized to show table data - Extensions - MIT App Inventor Community
Can you share your relevant blocks of what you have done so far and indicate in detail which part you are having problems with?