Why are some products not appearing on Facebook?

[SteveH25]

Hi,

This is driving me crazy as some of our products are showing on Facebook, but others aren't and I can't find the difference in them.

For products that aren't showing I get this error in Facebook:

and when you go into the shop account this is the screen we are shown.

and as you can see the item isn't in the shop.

Within Shopify, the Facebook and Instagram sales channels are selected: 

If we click the switch over to on, the item does appear on Facebook, however, we have over 1,000 products to do this on, so would rather do it in Shopify.

I thought the "disabled_capabilities" and "mini_shops" values may have something to do with the problem, but can't find anywhere to fix it.

Thanks
Steve