I think the ressource is the right track.
Device or context Icon size
iPhone 180px × 180px (60pt × 60pt @3x)
120px × 120px (60pt × 60pt @2x)
iPad Pro 167px × 167px (83.5pt × 83.5pt @2x)
iPad, iPad mini 152px × 152px (76pt × 76pt @2x)
App Store 1024px × 1024px (1024pt × 1024pt @1x)
look e.g here:
https://developer.apple.com/ios/human-interface-guidelines/icons-and-images/app-icon/