The iPhone SE 4 should adopt the iPhone 14's design, swap Touch ID for Face ID, use USB-C instead of Lightning and sport an Action button.
Looks like the next iPhone SE will adopt Face ID with a notch
iPhone SE 4
An OLED iPhone SE with Apple’s custom 5G modem could drop in 2024
Apple has apparently restarted the iPhone SE 4 development, with the upcoming phone expected to debut Apple's own 5G chip and adopt an OLED display.
Analyst: A larger-screened iPhone SE is not coming this year
Don't expect a change in iPhone SE screen size until 2023 because a third-generation model due this spring should retain the same 4.7-inch LCD display as the current one.