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That's basically the entire state of mobile(minus a few weird SoCs) and many game consoles, makes for a much more convenient development platform.

I'm not familiar with mobile / APUs, but I was under the impression that it was still necessary to do clCreateBuffer (or similar). I could only find old slides (https://developer.amd.com/wordpress/media/2013/06/1004_final...), though.

Would you mind pointing me in the right direction to learn about how to do this? (something equivalent to slide 2 of https://www.olcf.ornl.gov/wp-content/uploads/2018/12/summit_... but for mobile/APU)?

https://www.khronos.org/registry/OpenGL/extensions/OES/OES_E... is the basic entry point on most the OpenGL ES platforms, elsewhere you get into platform-specific APIs.

Mostly my point was the unified system/gpu memory is pretty common outside of the desktop space.