It's an interesting question because you'd think, in theory, that producers would be more attracted to revivals than to new plays, because they're more likely to bank on title recognition. And because, in the case of some of the older classics, they're in the public domain, which saves money. Plus, bankable stars might be more drawn to roles that are already in the canon, because they may be more familiar with them.
But I think part of the answer to your question lies in the fact that the majority of the plays confirmed for this season are being done by non-profits, and the non-profits tend to favor newer works. Roundabout favors revivals, but even they're also doing a new play on Broadway this season.
Why are most of the plays being done by non-profits? Well, SO many of the for-profit plays in the past couple seasons have flopped commercially, so maybe there's some hesitation there. But also remember we're talking about ANNOUNCED productions, and the non-profits announce their shows earlier, to sell subscriptions. So the announcements are more likely to front-loaded with non-profit plays.
Incidentally (and maybe it's worth mentioning this in the 2023-2024 Season thread too, or even a thread of its own) I have to wonder about Appropriate. Will it be considered a revival? Between Riverside and Crazy premiered in 2014 (the same year as Appropriate), and it was considered a new play at the Tonys. But I'd argue it was right on the cusp, and this production of Appropriate is obviously a year later, making the gap 9 years instead of 8. PLUS (and maybe more importantly) that was more or less a remount of the original production, whereas Appropriate will be a brand new production. Yes, the same was true of Thanksgiving Play and Straight White Men, but those plays were only 4-5 years old at the time of their Broadway productions.
Blackbird is a recent precedent that I often go to in grey area cases; the Broadway production was 9 years after its Off-Broadway premier (same as Appropriate), and it was considered a revival. And unlike Appropriate, Blackbird wasn't an entirely new production (not identical - but same director, set designer, and lead actor).