A joystick extender is a small joystick piece that has tiny claws at the end allowing it to fit onto your controllers joystick. It has a harden silicone top which makes it more comfortable to use compared to it being only plastic. From what I have learned, it can be tricky to use a first. With it being elevated 9.9mm it will feel foreign for about a week. After that however, it get’s more comfortable, and easier to use.
These extensions help most when using the “Button Puncher” setting whilst in game. What the button puncher setting does is allow you to crouch or go prone without ever moving your thumb away from the joystick. You can also change the setting to allow you to jump, use special ability’s, etc. The main use for this attachment is to allow you to do other actions without having to move you thumb from the joystick.
The Inferno Joystick Extender is the one I’ve been using for almost a year and it’s worked amazingly since. (The Inferno Joystick Extenders are compatible for Xbox X|S,Xbox One, Ps4/Ps5, and also Nintendo Switch as seen above).