Have a 2021 Chevy TB with a 6.2.
First engine failed at 22k in the shop for two months, Approx: 1 month to approve motor swap, 1 month to replace the motor.
Second motor failed at 23k, took them one month to replace the motor.
Both failures occurred at cruising speed on the freeway towing a lighter boat. Both bottom end failures.
I think GM needs to step up and do something about this, I talked with GM and they refused a buyback and/or full replacement.