Certain products have disappeared from Instagram/Facebook shops

[BardAndBauble]

So I have the Instagram and Facebook shops set up and I currently have 5 active products but only 2 are showing up on both shops now when before all 5 were 

I looked in the product details and can't find any differences in their settings so I am a bit lost as to how to fix this and prevent it in the future as I am working on a new collection now.

Any help would be appreciated!