I can't find any specs about the various iOS keyboard sizes across iPhone SE, 8, 8 plus, X, XR, Xs Max, etc.

• Is there one keyboard that scales accordingly to phone and screen size? I think the iPhone SE is the only one that has a smaller keyboard?
• Is the "chin" below the keyboard the same size across the different X phones? E.g. what's the distance between the bottom of the screen to the space bar for instance?

I was hoping it would be in Apple or Facebook Design's UI kits, but alas, no!

Help? :)