Hide Add charge product from Search bar

Step 1: In your Shopify Admin -> Settings

Step 2: In the Settings -> Custom Data -> Products

Step 3: Add definition

Step 4: Select type -> Integer

Step 5: Fill in the information below and hit "Save"

Name: SEO Hidden

Namespace and key: seo.hidden

Minimum value: 1

Maximum value: 1

If you run into an Error message stating that the the seo.hidden metafield has been used somewhere already, you can use the link below to continue.

Replace the "yourdomain.myshopify.com" part with your actual domain to make this link work: https://yourdomain.myshopify.com/admin/settings/custom_data/product/metafields/migrate/seo/hidden

After the Custom Data is set up, hiding your add-on products would be easy using the bulk edit. Here are the next steps

Step 6: In your Shopify admin -> Product section -> filter by Types: Avis-add-charge -> Select all add-on products

Step 7: After selecting all add-on products -> Bulk Edit -> Column -> Scroll down and hit "Show all metafiles" -> Find and select "SEO hidden"

Step 8: Fill in the number 1 in all the add-on products

Step 9: Hit Save and that's it