What matters
App Store Screenshot — iPad dimensions at a glance
iPad App Store screenshots at 2048×2732 are required for apps that support iPad. They must show the actual iPad interface, not a scaled-up iPhone layout, and appear on the iPad App Store listing.
iPad users expect apps designed for the larger screen. Screenshots that show a proper iPad layout signal quality and build confidence that the app isn't just a stretched phone experience.
Submitting iPhone-sized screenshots for iPad results in rejection. Screenshots showing a phone UI scaled to tablet size signal a lazy port and discourage downloads.