As per the new rumors surrounding the launch of new Apple products, iPhone 13 Pro Max will come with a 120Hz low temperature polycrystalline oxide LTPO OLED display and will be provided by Samsung for iPhone 13 Pro and Pro Max. The iPhone 13 & iPhone 13 mini will have 60Hz refresh rate and wil use LTPO panels from LG and Samsung for iPhone 14.
While it is expected that the iPhone 12 & 12 mini will have standard 60Hz OLED display.