Why Chevrolet is extending the 2023 model year is still unknown, but it likely depends on supply chain issues as there will be some updates as the C8 generation enters its third production year. There are rumors of an actual refresh, mainly of the interior, but there haven’t been any credible sources yet.
However, if the rumor of a new infotainment display screen digital dash display are true, that could explain the delay. Chevy is also busy with the Corvette for the Z06 and the electric E-Ray model, so it could be a confluence of all of this.