COMAC, but there would be no way a new manufacturer would be able to keep up with global demand.
https://skift.com/2024/02/25/can-chinas-new-plane-compete-with-airbus-and-boeing/
Airbus doesn't have the safety issues Boeing has. Airbus put in the proper R&D including safety into the A320neo to make it a safe plane. Boeing needed to play catch up to make something that could compete against Airbus's plane and decided to cut corners.
Keep in mind there are roughly 15 to 30 questions on each ballot. If they're manually verifying each answer on each ballot, then it's really easy to make mistakes.