Don't really know what you talking about. The antireflective coating of course is on the 2024 pros aswell. You can see it in the technical specs.The cheapest iPADs didn't have that. Perhaps Air and Pro both did. So what Apple really improved with the 2024 models? Did they remove completely from the 256 / 512 GB versions, and only put any coating in the 1 / 2 TB? If the answer is yes, this may also be a way of fooling us.
https://www.apple.com/ipad-pro/specs/