Ok, my mistake, there is no Output AOVs node but "Output AOVs" input in render target node.
The naming for output is a unnecessary name dubling. We don't have this in Standalone. The last node is "Output AOV group" which is connected to "Output AOVs" input.
In Blender instead of naming Output node "Output AOV group Output" I would call it "
Compositor Output" as we are in Compositor window. It should follow the general rule used in Blender eg. in material we have "Material" output" in world we have "World output" etc.
The naming should go like this:
Output AOV group out > Compositor out
Output AOV group Output > Compositor output
OutpuAOVGroup > Output AOVs