In the arcade projects thread
At first comments It mentions
That
input control can be set to lock player 1 and player 2.
And fun factory ( the manufacturers or at least the seller on Ali express says
To delete the semi colons infront of the no merge pid and vid ?
I wil only try the .ini exactly as you have shown but just saying conflicting info all over the show.
Player 2 working auto matic

the Antoni adapter.
@ Fantzia ..
Tried with your .ini No dice .
Still says define joystick?
Does yours say define joystick or sticks ?

Does this vid & pic match yours ?