I believe there is a built-in ability to show a “sold out” badge overlay on the image of the product when the inventory is set to 0, but for some reason it doesn’t show on my store. Is there a setting somewhere that I’m missing? I have looked high and low for an answer on this. Any help is greatly appreciated!
That feature is supported by the theme. You should find the setting under Theme customizer, if it is not there, then it is likely your theme does not support it.
@catcarothers - please open your any product/collection page in the customizer, on the left side you will have the options for that particular page, please check if you have any checkbox with text like enable sale /sales badge or discount… if yes then click it.. if no option then your theme may not be supporting it