Looking for way to add a setting to the product creation template that is an saveable option that displays for all new products. I know how to add the code to my liquid theme as a theme setting, but do not know how to make this checkbox display on a per-product level. The message would be the same across the entire site and does not need to be customizable; would set it through the IF statement in the template. I've reviewed metafields but can't figure out how to make them default for all new products. How do I add an option like this?
Here is an example of what I would like it to look like to the admin user (I just used inspector for this):