Hi Alan, you can see a question mark beside all of these. You can hover your mouse on them and it will give you an idea about the issue. And if you go to products individually, you will find out exactly what is wrong with that particular product.
Also, you can see there are some missing values. So some of your products which should have these values, are not inputted. Make sure you have added all the necessary data that Google requires. (You can read this guide if needed)
Certain custom fields required won’t be there on WooCommerce default, and by default, you can only add custom fields for Single Products. For variations you usually need to either add fields by coding, or by using a plugin. Our plugin only includes these custom fields on the Pro version.
But right now, I suggest that you first generate feed for a small amount of products, for example, use category filter and just generate feed for a single category. And try sending to Google and see what issues come up.
Do not generate for apparels until you have custom fields since those extra data (gender, color, age group) are mainly required for apparels.
And when you use identifier exists, on the value, assign it identifier exist calculator. It will automatically assign a valid value.
