How do I add my course site "Zoom" tool as a module item?
Click Modules

To the right of the Module name, click the Add Item (+) button

This displays the Add Item dialogue box
Use the Add Item dropdown box to select "External

This displays a list of the external tools available for your course site.
Select "Zoom", then click Add Item

This adds a link in the Module to the course site Zoom page.

NOTE: Make sure to Publish the Zoom link