Another question, why does the A321 NEO tend to nose drop after closing the thrust during flare?
Even if the CG is around middle or aft side.
Flare mode on the A321 NEO is a direct stick to elevator law, not the altered normal law that the older A321s (and all A32x series have, really). So you gain a pitch/power couple which you need to control with additional back pressure.
Normal law resists pitch changes by targeting zero pitch rate, with another loop to maintain 1g flight (the FCOM gives a simplified overview, but at lower speeds it’s actually a pitch rate law because otherwise you end up with PIO due to the lag between input and response). In order to land you “need” the nose down order generated by the flare law otherwise you’ll start climbing again.
You can try this in the simulator by entering abnormal attitude law and then landing (this leaves you in pitch alternate law for landing), or by leaving the gear up. It’s quite interesting to see and worth the time.