Well youre right, evolution doesn’t make such a prediction. no wonder you haven’t seen any proof. Evolution isn’t a biological philosophers stone, transmuting all living things.
In bacteria evolution is more of a web because of horizontal gene transfer (bacteria can pick up stray DNA & easily incorporate it even across species).
& species alive today would not be predicted by evolution to change into one another. Chickens & elephants have a common ancestor that likely looks like neither today.
From quota “The nearest common ancestor of birds and mammals was probably an eight-inch long reptile that lived anywhere between 320 and 340 million years ago.”