Is it possible to assign new function to "left swipe" on MIUI11
If you want to get rid off the news feed and have only google search enter in application google then in the settings of the application ( click on more that is in the bottom right corner then settings ) enter general and turn off discover.
If you want to remove the function of left swipe enter in settings then in the home screen then turn off google discover.
There is no option to change google app from function left swipe.