Currently using one android integration to control my TCL TV but I need another to control my Nvidia shield and whenever I try to add another it only allows me to edit or change the TCL one I currently have and does not search for other android devices.
No need. You can control several Android TV with the integration. I have six. After setup you see 2 drop down menu. 1st for paired devices and 2nd what you want to do. Select add new device.