OpenGL is being gradually killed off.
Apple now make you use Metal, though in their typically helpful way they refuse to release c++ bindings for it. Objective C or Swift only.
Android is moving to Vulkan
Stadia is Vulkan only
Windows DX12
Even in UE4 you notice a massive improvement if you swap to DX12.
Across the board OpenGL seems to be a waste of development time. I see bugs in OpenGL renderers that have existed for ages and no one seems interested in fixing them, I see updates coming out in engines that feature changes for Vulkan, DX11, DX12 and none for OpenGL
It’s dying and IMHO you should be moving on and keeping your skills relevant by learning something new that is relevant to you