This is behaving as expected, the reason is the way the URP renderer handles the CameraDepthTexture.
The main issue, in a nutshell, is that URP can produce the CameraDepthTexture in 2 ways: via CopyDepth, or via DepthPrepass.
In your specific case, since you have a render feature, injected BeforeOpaque, this causes a DepthPrepass (or DepthNormalPrepass when requiring the normals too) to replace the CopyDepth. URP will never perform both a DepthPrepass pass and a CopyDepth pass per camera in the same frame.
The reason why in your current frame debugger capture you cannot see the DepthPrepass running instead of the CopyDepth pass is that this particular
scene has no standard geometry, except the one assigned to the layer rendered by the RenderObjects pass.
Just adding a simple 3D cube to the scene will cause the depth prepass to run and to show in the frame debugger.

The following is an explanation of what causes Depth/Normal prepasses to replace CopyPass passes:
- a pass running BeforeOpaque requests depth. If the pass requests only depth and would run AfterOpaque, then the CopyPass will still happen.
- a pass runninr at any point in the frame requires "Normal" input: the only way for URP to generate the normals texture (in the forward renderer)
is via DepthNormalPrepass.

In general, if in your specific use case it is necessary to have both a pass that requires "Normal" as input, and at the same time a CopyDepth is required to happen after Opaque,
the only option is for you to implement a custom copy depth as render feature.