https://wccftech.com/first-apple-iphone-13-prototype-details/

Whatever features you might have thought would end up on the iPhone 12 and didn’t, it looks like those additions might arrive on the 2021 iPhone 13 family. Then again, Apple is known for experimenting with multiple prototypes before settling on one model that may, or may not sport those changes. According to a tipster, the first iPhone 13 prototype details have emerged, with some hints being given at its design being similar to the iPhone 12, with a few more steps involved.

The information provided by Jiorīku isn’t plentiful, but it’s all that we have to go on at this time. It’s more than possible that Apple sticks to the iPhone 12 design when launching the iPhone 13 series in late 2021; this will include an iPad Pro-like device touting flat sides and glass that sits flush with the surrounding metal frame or stainless steel, depending on what material the company uses for each model.