If you're not doing code review, you're not doing code review. If you're not gating builds on code review, you're not doing code review. If your developers are lazy and just approve the PRs as they land, you're not doing code review.
If you're thinking there is some magical line where LOC < n gets properly reviewed, but LOC > n doesn't, I assure you that's not the case.
And no one is turning off their approval gates in their build pipeline just to accommodate AI code.
But is the scale similar, or will AI coding make the problem significantly worse?