This would solve...

This will allow Node.js network inspector to monitor request data and response data on Chrome DevTools frontend.

The implementation should look like...

• undici:request:sentDataChunk with parameters request, chunk,
• undici:request:receivedDataChunk with parameters request, response, chunk.

Essentially, the diag channels shall expose request objects to allow subscribers to identify which request sent/received the data chunk.

I have also considered...

Monkey patching Request.onBodySent and Request.onData to intercept data chunks. The Request object is exposed with undici:request:created diag channel so it is possible to intercept data chunks with monkey patching.

Additional context

Refs: nodejs/node#53946