Yes, there are games that don't use OpenGL.
Yes, there are games that don't use OpenGL.
For your card, using DOOM in OpenGL may offer improved performance compared to Vulkan.
You rarely choose to switch to OpenGL directly. Instead, you typically rely on the API the game was designed for. You might notice options between various DirectX versions, or (in one scenario) between OpenGL and Vulkan, but it's uncommon to find a direct choice between them. Based on what I understand, your list likely refers to games running on Windows with DirectX 9 or 11. Some of these support OpenGL only in their Linux or Mac OS X versions where DirectX isn't available.