Mini LED is similar to OLED tech that is seen in more premium smartphone screens such as the Galaxy S10, iPhone 11 Pro and OnePlus 7T. Older and cheaper phones still use the less vibrant LCD, such as the iPhone 11.
The Kuo report says Apple will release 4-6 mini LED products over the next 2-3 years, meaning Apple might experiment with the tech before making it widespread. Mini LED is said to offer higher dynamic range, better contrast, better brightness control and can be shipped in thin panels. Also, they supposedly do not suffer from the ghosting ‘burn in’ of some OLED panels.
Apple adopting LED screens on more of its products Is overdue, but it looks like it will happen soon.