This video shows how to customize the buttons in Endfield while the UI is still bugged, I also forgot to mention it in the video, but if you set a button that has been assigned in other button, that button will switch place, so you have to set EACH ONE from top to bottom, plan first, execute later.
Cheatsheet:
Basic Button Settings
LB - L1
RB - R1
LT - L2
More Button Settings
B - ○
A - ✕
Y - △
X - □
RB - R1
