According to a recent industry report, Apple is planning an iPhone display that is very different from what is currently in fashion in China, namely the quad-curved trend from Xiaomi and others. It also has nothing in common with Samsung's Edge displays. However, there are reportedly problems with the implementation.
I had a iPhone 12 mini and would have loved a 14 mini if it existed :(. I ended up getting a 14 pro for a good deal but I miss the size of the mini