All of the view_item_list events has 5 items no matter which collection/product category that is. There should be all items showing up in list or collection in the page (CDP or homepage or anywhere having a list of products).
I reviewed the data pushed on website using Analytics debugger, the collection or CDP on Native theme (Dawn), which have 13 items on the page but the items listed under the event only contains 5 items.
@mfateamhuyen_shopify unfortunately there’s nothing we can do to increase the limit. It’s a decision the GA4 team made and it makes view items list events hard/impossible to track with more than 5 items.