AMD's OpenGL tools don't look too active either, e.g. the last release of CodeXL is from 2018, and this only updated dependencies or removed functionality, for instance this nugget from the release notes:
---
* Removal of components which have been replaced by new standalone tools:
* FrameAnalysis - use https://github.com/GPUOpen-Tools/Radeon-GPUProfiler
---
...that Radeon-GPUProfiler is that tool which has only D3D12 and Vulkan support.
Look around for AMD's OpenGL activity more recently, there's not much, which isn't surprising because they've been lagging behind NVIDIA with their GL drivers since forever. I bet they're eager to close that chapter.
NVIDIA seems more committed to GL still, but without having all GPU vendors on board to continue supporting OpenGL, Khronos won't be able to do much to keep it alive.