FSLabs is the only high-fidelity A321 for P3D. There is with working systems. You could try:
It includes both the LEAP-1A and PW1100G engine options, each with distinct startup sounds, vibration profiles, and fuel burn logic. fslabs a321neo free download better
A: Small market, high development cost (often 3-5 years for study-level jets). FSLabs is the only high-fidelity A321 for P3D