You're describing the WebGPU spec and its different implementations.

OP claimed WGPU had native support for VK, DX and others. But as far as I know, WGPU just supports WebGPU being translated on the fly to those other backends, with the obvious performance hit. If I'm wrong, I'd be interested to know, as this would make WGPU a more interesting choice for many if, in reality, the code was native instead of translation.

Edit: https://docs.rs/wgpu/latest/wgpu/#backends it seems they indeed support native code in almost every backend?