While certain smartphone shooting games have controller support to players who do not like joystick controls, it is not provided by every game.
In PUBG Mobile, you can not attach a Bluetooth-enabled controller to your mobile device or switch around without any official game-support outside of touch, but the key will not have activity marked on it.
The designers also ensure that players with Android émulators are assigned to their own lobbies, allowing them to play the game with a completely controlled controller or keyboard. If you use touch controls, then, you do not have to worry about having someone like normal PUBG playing the mobile game.
Several options are available to those who want to use a console, but none of them is as easy as attaching the controller Xbox or PlayStation. You may choose to use the external console shell which suits your mobile phone with arms that are precisely positioned to move the screen on.
Such controls are designed for secondary buttons rather than motion, so you still have to use such thumbs to get around the screen. But if your running animation has to be activated to hit another button, it has triggers that push the screen and do it for you.
For these smartphone specific controllers there are several different models available, and to get one of them will be your best bet while playing or minimizing touch controls unless you want to use a third party device.