It took me a while stumbling around their settings (maybe dark pattern alert) to figure out how to disable this for your team if you're an admin.

* Navigate to https://us06web.zoom.us/profile/setting

* Click on "Zoom Apps"

* Toggle the "Zoom Apps Quick Launch Button" sliders.

This took me about 30 min to figure out because all the emails from Zoom about how to 'manage' this was a link to their marketplace which is an upsell to add apps, not to disable it. HTH someone else.