Source: See kwasm website for details.
The kwasm addon deploys the KWasm operator that installs WasmEdge (the runtime used by Docker) and Fermyon Spin (the framework used by Azure). This makes it possible to run Wasm images built for Docker, or Spin images that run on Azure’s AKS WASI preview.
To enable the addon:
microk8s enable kwasm
The addon can be disabled at any time with:
microk8s disable kwasm