If you need to find new clues you have to find what is missing and why. While finding these facts is not proof, they are clues to asking better questions.
There is a binary star system Zeta Reticuli 1 and 2. From a planet around Zeta Reticuli 1 you would see the other star all day long as well as its planets. The stars are a billion years older than the sun.
The mirror on the Webb telescope would have to be a kilometer bigger to see detailed planetary features but it can analyze their atmospheres.
There are other reasons to explore those planets but this is the very thing that is missing or unmentioned. So I ask, is there a reason that information isn't found? Or is it too soon?