2021 Kia K5 GT-Line AWD
We kind of went over this issue in another thread about the a gas door release latch in the trunk. Unfortunately, there doesn't seem to be one for the 2021+ K5.I'm pretty sure your car has an override switch. Check in the trunk. It's there.
I don't think anyone has tried it out yet but perhaps unplugging the module would release the lock on the gas door. I'm thinking that there's a solenoid in the module that might hold a mechanism in palce to lock the door and maybe cutting the power to the module would release the lock.