Turn off smart fractions in New Outlook for Mac

I'm using Outlook for Mac 16.82.1 (24021813) with the New Outlook UI.  I'd like to turn off the feature that automatically replaces "1/2" with ½ as I type when composing messages.  Especially for mentioning code, it's important to me to keep 1/2 as three separate characters.

How can this be done?  I've found search results that say to turn off Fractions in the AutoFormat settings, but there is no such setting in this version of Outlook.