How far in the menus did you get before an option was not available?So I just verified, this setting does not exist on my 2015. Perhaps it due to the year or the cluster being the base / tradesman type? Ive even looked elsewhere for it but so far I've had no luck.
Have you updated your AlfaOBD lately? I made this change to a 2018, just looked and appears to be an option when selecting the 2016 body computer as well.