Finally working!! This is what I did:
Make file system writeable:
mount -o remount, rw /
Edit recalbox.conf:
global.inputdriver=sdl2
Edit bluetoothcontrollers.sh. Delete this lines:
killall bluetoothd
bluetoothd -u
Replace with:
bluetoothd -u
sleep 5
killall bluetoothd
Reboot the system:
reboot && logout
Pair the gamepad with X+HOME buttons and configure it.
Thank you @acris and @paradadf!! Hope this will help for future improvements!!