You are looking a programmable remap chip that allows for remappable buttons to your controller. This mod allows for programming of the buttons added to the rear of the controller to map to any controller button, triggers, D-pad direction and even the touchpad click. This chip also allows you to set or change the mapping of each button in just a few seconds.
This PS5 programmable remap chip also allows you to assign multiple controller buttons to one remap button. This allows you to, for example, Map R2 and X to one remap button. When pressing the remap button the mod will press both controller buttons at the same time. Finally, this chip allows for setting the remap buttons to rapid fire with several different speed options.