I have followed that guide. I can only follow step one as Step 2 and 3 are 8bitdo specific.
I complete Step 1 with no issue.
My controller pairs upon startup as its indicated via a blue LED on my controller.
Its just when i get to the configure controller screen after the Retropie splash screen, the screen where you hold a button to begin pairing. It is here that my buttons are not registering. However If i hit F4 on a keyboard and exit this config screen my controller inputs text perfectly when pushing buttons in the command screen.
Can’t find anything on here for anything other than 8bitdo or PS3/xbox. for example that guide is geared for 8bitdo