The WGSL are generated and compiled through TVM and embedded into the wasm.

I think what you mean is wgpu native support. At the moment the web gpu runtime dispatches to the js webgpu environment. Once TVM runtime comes with wgpu native support (like the current ones in vulkan or metal), then it is possible to leverage any wgpu native runtime like what Zig provide.

Additionally, currently tvm natively support targets like vulkan, metal directly which allows targeting these other platforms