As mentioned elsewhere, we do not officially support/provide any non-native customizations. But the basic idea of how you could customize the font, color, or something else used in product badges is to use some simple CSS customization:
- Go to theme settings
- Open the setting for Custom CSS
- Add some custom css like the code below — update it for your specifics!
- Save your edit.
p.c-card-product__badge {
font-family: YourFamilyName;
}