Extend the typography field with a 'text-transform' icon

Hello! Is there any way to extend the font-styles row of the typography field with a fifth icon, what gives a simple text-transform: uppercase; css attribute to the element?

I spent the past few hours trying to extend it: i searched through the entire kirki folder for ‘strikethrough’, duplicated them and renamed it to ‘uppercase’ everywhere using the ‘strikethrough’ option as a reference, but for some reason it still doesn’t render in the front-end of my customizer.

Any suggestions would be appreciated. Thanks!

https://www.ads-software.com/plugins/kirki/