const [ withLifeCycle ] = useSlateLifecycle({
  onUserStartsTyping: () => {},
  onUserStopsTyping: () => {}
});

// ...

<Editor onChange={(change) => {
    withLifeCycle(change)
    // .. other stuff
}}>

import { Editor } from "slate-react";
import useSlateLifecycle from "use-slate-lifecycle";

function MyEditor = () => {
  function onUserStartsTyping(change) {
      console.log("starts typing")
  }

  function onUserStopsTyping(change) {
      console.log("stops typing")
  }

  const [ withLifeCycle ] = useSlateLifecycle({
    onUserStartsTyping,
    onUserStopsTyping
  });

  function onChange(change) {
      withLifeCycle(change)

      // Do your regular updating
  }

  return (
      <Editor onChange={change} {/* ... */} />
  )
}