2022 Subaru Outback Tires Problems

The Outback Wilderness comes stock with Yokohama Geolandar A/T 225/65R17. There was 13,300 miles on it from factory new tires. At interstate speed of about 75mph, the tread appears to have fully separated from the sidewalls. The tread was closely inspected for any debris by myself, my dealer, and others and no tire punctures are present. We believe this tire has a manufacturers defect and would like to have it inspected if possible. We have kept the tread, despite asking dealer to save all part of tire, the still managed to lose the part from the rim, thought there as not much left from the accident, it was virtually destroyed. Very unusual in all my years of driving.