[pjmlp]

Mostly because their drivers suck, and don't get updates.

Android 10 made Vulkan required, because between Android 7 and 10, most vendors didn't care, given its optional status.

Android 15 is moving into OpenGL on top of Vulkan, because yet again, most vendors don't care.

The only ones that care are Google with their Pixel phones (duh), and Samsung on their flagship phones.

There is also the issue that by being NDK only, and not having managed bindings available, only game engine developers care about Vulkan on Android.

Everyone else, devs would still have better luck targeting OpenGL ES than Vulkan, given the APIs and driver quality, which isn't a surprise that now Google is trying to push for a WebGPU subset on top of OpenGL ES.