Adjust UI elements to the screen size

Hey. I googled for the solution but haven't seen anything posted less than a year ago, so Im here. I am trying to adjust UIButtons, images, all the layout of my app to the size of smaller screen like iPhone 7 and SE 2nd generations. Rest of the layout is fine. Is there any way to change layout specifically just to those two models? If not, how can I do it instead?
Many thanks for help.
Adjust UI elements to the screen size
 
 
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