Purple halo in wide angle

Hi all,

Recently the wide-angle camera of my iPhone 13 mini has this halo around the frame/image that I see. When I look at the back of the phone - where the lens is - I don't see any scratch or defect.

Do you know where it comes from?

Is this something Apple can fix? This is so weird because I've been very careful with my phone... it has less than a year old