Are there any examples of how, say, C++ compiled for WASM is different from native C++, or Python on WASM vs CPython? I haven't really used or cared about WASM,

Are there any examples of how, say, C++ compiled for WASM is different from native C++, or Python on WASM vs CPython? I haven't really used or cared about WASM, so I'm happy to learn, I don't have some agenda here.