I've been testing deployment slots for web apps. By attaching x-ms-routing-name to the query parameters you can redirect a call to a deployment slot (although you first need to manually change the traffic % for it to work).
Now I'm setting up deployment slots for Azure Functions to do the same thing. However it seems the x-ms-routing-name is not acknowledged? I also cannot change the traffic % for the deployment slots as they're disabled in the app service plan.
Can anyone confirm that x-ms-routing-name is not implemented/acknowledged for Functions?