Transmission drag oil pan

Here is a picture of a valve body windage tray. But I would think the logic for the low rear sump would increase fluid volume and prevent the sump filter from sucking air during a wheel stand. Turbo Action has a special angled filter adapter on their website but picture is not very clear.

View attachment 1715806771

View attachment 1715806775
I still cannot visualize what that tray does that the valve body would not do. What does the tray cover?