Problem: How to display simple products with views or filter view to display simple products
Solution: "product_type" is the hidden taxonomy used by WooCommerce to store the product type. You need to use view's hook wpv_filter_query in order to query the simple products.
You can find proposed solution, in this case, with the following reply: => https://toolset.com/forums/topic/display-view-results-only-for-simple-product-type/#post-902918
Relevant Documentation: https://toolset.com/documentation/programmer-reference/views-filters/#wpv_filter_query
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