I added a couple lines to your #11 setup code to enable the drivers:
void setup() {
// Initialize serial communication
Serial.begin(9600);
// Set default speed and acceleration
stepperX.setMaxSpeed(1000);
stepperX.setAcceleration(500);
stepperY.setMaxSpeed(1000);
stepperY.setAcceleration(500);
pinMode(8,OUTPUT); digitalWrite(8,LOW);
Serial.println("forum: [XY] <steps> <speed> <acceleration>");
}
and dropped the code into this Wokwi simulation setup and it seems to work as expected: