Below is an article that guides you on how to display complete the look products in Shopify.
Complete the look is an effective way to enhance product discovery and improve customer shopping experience. This feature allows you to showcase styled product combinations or complementary items together on the product page, helping customers easily visualize a complete outfit or setup.
Step 1:
From your shopify store admin > Click "Settings" > Metafields and metaobjects > Products
Step 2 : Click on “Add definition” button and add data as below
Name: Complete the look
Namespace and Key: custom.complete_look(Must be same)
Select Content type: Products ( Select “List of products” )

Step 3 : Select List of products and save.

Step 4 : Now go to products from store admin, scroll down to “Metafields” and select products in Complete The Look
Click on Complete The Look field > select products > add product you like to display in page then click on save button.
Step 5: Save product page and it’s done. Check now on product page on front side.
The Avone theme comes with a built-in Complete the Look products feature, so you don’t need any extra setup or apps. You can easily display matching or complementary products directly on the product page to create a styled shopping experience. This helps customers discover related items quickly and encourages them to purchase complete outfits or product combinations in a more visual and engaging way.