I'm new to Shopify. I imported products from AliExpress using Oberlo. The items do not show in Catalogue nor in Collections. I'm using Debut Theme. I created some 28 Collections and imported some 400 items (not knowing that Oberlo limit is 500). I selected "auto" while importing them and same while creating the collections too. Now none of the 28 Collections shows any of the 400 items. Items do show if searched. Can someone help please?