Gamepad controls\key maps - option for simultanious presses, long presses, double taps.

I'm having a problem setting up a minimalistic mapping for anki using only the headphone buttons - vol up , down, and headphone key. using double taps, long holds, or simultanious inputs , I can execute all the actions I need with only 3 buttons.
for me it is crucial if i want to do listening card on walks, and also intuitively have all the keyboard shortcuts for flags, sync etc - using a comfortable maping.

The feature that would make mapping more individual - option for simulatanous inputs (A+B pressed together) , double taps (Pressing A, A. selecting the interval they need to be pressed apart for a new action to be assigned), long holds ( Press A for 2 seconds and it'll be assigned as a different input the can have its own action). a combo or long presses, and simultanious presses (press A+B for 2 secs for a unique action).

I have tried a different keymapping app that has those options "keymapper" on the playstore. I need to switch keyboards from the settings menu to use it so it's not convenient, and scrolling the view of a card using the joystick messes up with the input , since anki will target the answerbuttons after I scroll down, and then pressing my inputs does something else..