Quite simple : when on a DuckDuckGo or Brave results page, just press Alt+g to go to the Google results page for the same query.

As this is a user script, you have to install the ad hoc browser extension first :

• Firefox users, install Tampermonkey or Violentmonkey
• Chrome/Chromium users, install Tampermonkey or Violentmonkey

Then, just visit the user script URL :

https://github.com/juba/ddg2google/raw/master/ddg2google.user.js

As I am quite lazy, having to type h !g Return each time I wanted to go to a Google results page from DuckDuckGo or Brave was way too tiresome.