iOS Single point reference for screenshot requirements

the must screensize requirements are for 6.5, 5.5 and 12.9 inches.
 which are the ones below,


6.5 inch (iPhone XS Max, iPhone XR)
1242 x 2688 pixels (portrait)

2688 x 1242 pixels (landscape)
Optional
Upload 6.5-inch screenshots

5.5 inch (iPhone 6s Plus, iPhone 7 Plus, iPhone 8 Plus)
1242 x 2208 pixels (portrait)

2208 x 1242 pixels (landscape)
Required if app runs on iPhone
Upload 5.5-inch screenshots

12.9 inch (iPad Pro (3rd generation))
2048 x 2732 pixels (portrait)

2732 x 2048 pixels (landscape)
Optional
Upload 12.9-inch iPad Pro (3rd generation) screenshots

references:
https://help.apple.com/app-store-connect/#/devd274dd925