WebAssembly - callback is missing when WebAssembly module is ready to receive messages from Javascript

I have a Qt app that I build for WebAssembly.

The Website that is embedding this WebAssembly module is sending messages to the loaded WebAssembly module via Javascript.

Previously I used Qt 6.2.2 to build this app.
I recently update to Qt 6.3.2 to build it.
Using Qt 6.2.2 version, I could get notified when the loaded WebAssembly module has became ready to receive messages from Javascript.
I was doing this : 

function init() {
  var spinner = document.querySelector('#qtspinner');
...


  var qtLoader = QtLoader({
...
  });
  qtLoader.loadEmscriptenModule("myModule");
  
  Module.postRun = function() {
      console.log("Ready to send messages...")
  }
}

Using this new Qt 6.3.2 version I couldn't find the same.
The generated qtloader.js is different and it doesn't offer a way to get notified when the app is ready to receive messages from the Javascript side.
`Module.postRun` is not available any more. The public API have this removed.

Would it be possible to re-add the ability to be notified when the app (loaded WebAssembly module) is ready to receive messages from the Javascript side?