How did they remove the wifi chip? by the way, pi zero has no wifi at all.
What do you mean how? They simply desoldered the wifi chip from the board, and by the way newer version of Rpi zero devices does have wifi (only older version 1.3 doesn't have wifi), so better do your own research:
https://www.raspberrypi.com/products/raspberry-pi-zero-w/It's not a fucking pack of peanuts and you could just remove the bad ones. WIFI chip can be removed from an ESP 32 is the first time I have ever heard. It's probably not the easiest thing to do.