Is there an existing issue for this?
Which topic?
https://developer.adobe.com/commerce/webapi/rest/modules/custom-attributes/#order
What's wrong with the content?
The Order section in this page refers to inexistent POST /V1/order endpoint.
According to the API documentation the correct endpoint is POST /V1/orders (Ref: https://adobe-commerce-saas.redoc.ly/tag/orders#operation/PostV1Orders)
What changes do you propose?
Replace /V1/order with /V1/orders
Anything else that can help to cover this?
No response