How to Disable Touch Bar Zoom on MacBook Pro 2016
I got it to work. 

Selecting the "System Preferences" from the top left "Apple" icon or just clicking the "System Preferences" icon directly both result in the "Enable Touch Bar Zoom" checkbox NOT showing up. 

The only way to consistently get it was to right click or click and hold on the "System Preferences" icon found in the dock, then select "Accessibility", then select the "Zoom" tab. 

No idea why it's any different, but it is.