Unity normal maps orientation format: OpenGL or Directx?

I'm going mad with a Unity directx11 desktop project.
I'm using Substance Designer to create textures and export them to Unity as texture files.

The problem is about the normal map: normal map on Designer 3dview mismatches the result on Unity.
First of all, I'd like to know which normal map orientation uses Unity: OpenGL (Y+) or Direct (Y-)?
I havent' found any official information.Just some random posts between Unity Answers and Allegorithmic forum and it seems that Unity uses OpenGL (Y+). Does someone know any official information?

I'm using Unity 2017, so legacy render pipeline, not new HD SRP

Thank you

 

Its Y up.

Look at all these examples: https://docs.unity3d.com/Manual/StandardShaderMaterialParameterNormalMap.html

 

Thank you.
So now I'll check why I have mismatching with Designer.

 

I've completely resolved.
I had to change the normal orientation of the preview material used in Designer.
In this way, all is aligned: Unity, Normal Node in Designer and 3D preview in Designer.

 

Hi there,
I had this issue so from Substance to Unity, so do you have to create the normal map as Open GL instead of Direct X to work correctly within Unity

 

as i struggled with this, too (once again, like every year atleast once) ...
(and this is the top google result, atleast for me)
...here is the right answer:

as usually found inside a great article from great @bgolus
https://bgolus.medium.com/generating-perfect-normal-maps-for-unity-f929e673fc57