In addition to what SilverWarior said, remember that on Windows there is no native OpenGL ES support, other than what you mentioned, working either in software emulation (and PXL has software renderer of its own) or a wrapper on top of DirectX 11, which PXL supports directly. On Linux, you also need to install special packages so that OpenGL ES calls get translated to OpenGL. Nevertheless, if you really need OpenGL ES on Windows, you can just adapt existing OpenGL ES provider - it shouldn't be too difficult.
I have already made a couple of experiments with Vulkan and this provider is planned to be added.
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