How do you change e-commerce variant out of stock styling?

I can’t find this anywhere, I want to change the out of stock variant styling for the button style (M & XL in this example). See image below. Does anybody know where this can be changed?

Many thanks

Here is my site Read-Only: Webflow - GoldHouse (It’s on the page called “store”)

Hi @Jack_Hayward, did you manage to find a solution for that? I just ran into the same issue