With the default OpenGL code path being removed in Qt 6.0, all platforms and devices that are not verified with the new QRhi-based rendering path become unsupported by default.
To not end up in regression hell, the bare minimum in the mobile space is to test, measure, and fix if needed the following:
- Android with NVIDIA, both OpenGL and Vulkan. Either Shield TV or Pixel tablet.
- OpenGL and Vulkan on a Mali or Qualcomm GPU on Android (must not be NVIDIA, that is covered elsewhere and is rare in consumer phones)
- Metal on iOS (iOS support must be implemented first). Do we care about OpenGL on iOS anymore?