Capstone added initial support for WebAssembly in this PR: #1359. This added the initial set of Wasm instructions that were in the Spec in 2019. Since then, hundreds of new instructions have been added, listed here: https://webassembly.github.io/spec/core/binary/instructions.html
What would be necessary to add the new instructions to Capstone? Note that LLVM supports Wasm disassembly.