2022 Genesis G70

I am reporting a recurring drivetrain defect in my 2022 Genesis G70 3.3T Sport Prestige AWD (current mileage: 20,000 miles). The vehicle produces a prominent, loud mechanical whining and droning noise specifically when driving within the speed range of 55 mph to 65 mph. The issue is highly load-dependent: the noise significantly intensifies and gets louder when decelerating/coasting down through this speed window without the brakes applied and it is very prominent on smooth roads or highway. The sound distinctly originates from the front front-end/drivetrain area, heavily pointing to an issue with the front axle differential ring/pinion gear mesh or a failing pinion bearing. The manufacturer (Genesis Corporate) and authorized local dealership Genesis of [XXX] have acknowledged hearing the noise but are currently refusing to perform repairs or replace components under the factory powertrain warranty, claiming that because another vehicle of this specification make the same sound, it is a "normal operating characteristic". A severe, loud drivetrain whine that worsens on deceleration indicates mechanical play or improper factory tolerances. Left unaddressed, a failing differential or bearing can bind or fail catastrophically at highway speeds, posing a severe sudden locking hazard and safety risk. Genesis Corporate Case Number for this issue is: XXX INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)