Our reverse-engineered, free and open source graphics drivers are the world’s only conformant OpenGL ES 3.1 implementation for M1- and M2-family graphics hardware. That means our driver passed tens of thousands of tests to demonstrate correctness and is now recognized by the industry.
To become conformant, an “implementation” must pass the official conformance test suite, designed to verify every feature in the specification. The test results are submitted to Khronos, the standards body. After a 30-day review period, if no issues are found, the implementation becomes conformant.
Unlike ours, the manufacturer’s M1 drivers are unfortunately not conformant for any standard graphics API, whether Vulkan or OpenGL or OpenGL ES.
It's amazing the work that these guys are doing implementing all these drivers of the Apple Sillicon without help from Apple, just reverse engineering it themselves!