skinningPalette uniform is not uploaded to shaders in the Qt 3D RHI backend

Using Qt 3D with QML. Seems like the uniform "skinningPalette" is not uploaded to the vertex shader when using the RHI backend. I found no reference to it in the source code for the RHI renderer (https://code.qt.io/cgit/qt/qt3d.git/tree/src/plugins/renderers/rhi/renderer/renderview.cpp#n1041), even though documentation online says this uniform should exist, and there's no mention of armature animations only being supported on OpenGL.