Full page background image size after new iphone models has been released (xs max, xs, xr) (xcode, swift)

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Xcode

Swift

Here are the iPhone Resolutions as you know;

Iphone Xs Max 414x896 points Render at 3x, 1242x2688 px
Iphone Xr 414x896 points Render at 2x, 828x1792 px
Iphone X, Xs 375x812 points. Render at 3x, 1125x2436 px
Iphone 6+, 6s+, 7+, 8+ 414x716 points, Render at 3x, 1242x2208 px
Iphone 6, 6s, 7, 8 375x667 points, Render at 2x, 750x1334px

Let's assume I would like to create a full page background image. Can you confirm x, @2x, and @3x sizes please?

Is 375x667 px true for @x?
Is 750x1334 px true for @2x?
What about 3x size? 1242x2688 ( Reference should be iPhone Xs Max for the @3x size?)

What I have tried:

i have tried lots of combinations but they don't show sharp background image.