Hi! I'm using messenger sales channel to display my collections in my shopify store. it displays successfully but when I click browse products in a collection it doesnt display anything. I've tried searching what might be the problem and I find out that my products need to have variants so I tried filling that out and it works, it displays my products. The only problem is what if I have a product that doesnt need a variants? Like jewelries and some stuff like that. Is there a way to display my products in that way? Thanks!