No REAL Documentation?

Since info provided here and at:

https://docs.unity3d.com/Manual/NativePluginInterface.html

is extremely scarce I started a thread at Unity forum:

https://forum.unity.com/threads/native-plugin-documentation-is-lacking.1220007/

Is IUnityInterface actually meant to be used at any professional capacity or was it meant for enthusiast to try and deduce everything from header files and very simple examples?

At one point in the Vulkan example it says:

// can't use GPU transfer here because is not marked as transfer src

No part of the documentations actually mentions what mode of access is supported by all the different resources in all the APIs (dx11, dx12, vulkan etc). Are people just supposed to experiment and see what won't crash? Is it even possible to access any kind of Debug Layers when working on the plugin to receive any meaningful feedback?

I don't expect any replies but hope this post will help other devs to get an idea of what they are getting into.

Start with the Native Plugin Interface documentation and the linked Vulkan example, then review the Unity forum thread for the unanswered questions. The issue covers resource access modes across DX11, DX12, and Vulkan and debug-layer support; it is complete only when those behaviors are documented clearly.