Shopify Functions can now read metafields attached to delivery options in the cart. On API version 2026-10 , you can call metafield(namespace:, key:) on any option in cart.deliveryGroups.deliveryOptions . This affects apps that build Delivery Customization Functions and any other function whose input includes delivery options.
Delivery options in Shopify Functions input now expose their metafields
calendar_today
September 15, 2026
domain
shopify-admin