Chrome Extension - Monitoring network traffic with body data in background

Question

I want to monitor the network traffic from background.js (or content script) on any page with response body data.
I tried these before:
  chrome.devtools.network which allows us to monitor the network only when devtool is open. (I need to do this in background or maybe injected script)

chrome.devtools.network.onRequestFinished.addListener((request) => {
   if (request.response) {
       console.log(request.response);
   }
});

  chrome.webRequest which gives us limited information about requests without their bodies.

chrome.webRequest.onCompleted.addListener((details) => {
     console.log(details);
  },
  {urls: ["<all_urls>"]}
);

I also checked this
  Chrome Extension - How to get HTTP Response Body?

Is it not possible for security or some other reason or is it possible to somehow observe the network traffic with the response body?