Got the one handed remote Anking recommended from Amazon and have been able to map all the buttons (on Karabiner) except Y on Mac. Anyone having any issues with this/know how to fix?

MFi controllers

So, not even one hand controller like this? -

https://www.amazon.com/dp/B01NAPASM1/?ref=exp_theanking_dp_vv_d&th=1

Then, what are the "simpler" option for iOS users?