About this discussion about what version of OpenGLES and Vulkan the hardware can support, I got info from a more official and reliable source:
I found at khronos.org that VideoCore V (the previous version of RP4's GPU) is OpenGLES3.1 conformant
https://www.khronos.org/conformance/adopters/conformant-products/opengles
...so we can assume VideoCore VI is at least hardware capable with ES3.1.
Also in the same website VideoCore VI appears as Vulkan 1.1 capable:
https://www.khronos.org/conformance/adopters/conformant-products
Although for now the open drivers only supports GL ES 3.0.
This will benefit many emulators for PI, which most relies little in the GPU due to the huge limitations of VC4, which only can use ES2.0.
Although I don't believe RP4 might run most Gamecube games at fullspeed, maybe, just maybe, could run the lightest games like Animal Crossing with some virtual underclock.
I found at khronos.org that VideoCore V (the previous version of RP4's GPU) is OpenGLES3.1 conformant
https://www.khronos.org/conformance/adopters/conformant-products/opengles
...so we can assume VideoCore VI is at least hardware capable with ES3.1.
Also in the same website VideoCore VI appears as Vulkan 1.1 capable:
https://www.khronos.org/conformance/adopters/conformant-products
Although for now the open drivers only supports GL ES 3.0.
This will benefit many emulators for PI, which most relies little in the GPU due to the huge limitations of VC4, which only can use ES2.0.
Although I don't believe RP4 might run most Gamecube games at fullspeed, maybe, just maybe, could run the lightest games like Animal Crossing with some virtual underclock.