Order Shipping Label Dimensions

I can see that Shopify lets a user in the admin see the dimensions for a shipment when the shipping label is purchased through Shopify’s shipping platform. If I go to the order and look at the timeline I can view this information. But I can not see where I can access this data in the GraphQL API. Is this yet another case where Shopify seems mysteriously determined to make shipping dimensions a general nightmare to work with, or am I missing something?