It’s called Pareidolia.
This is the phenomenon of recognizing patterns, shapes, and familiar objects in a vague and sometimes random stimulus. It’s the result of your brain trying to “make sense” of input that really has no sense to find in it. This is seen often in inkblot tests, where random splatters of ink suggest different images to different people.
I do this all the time.. I see faces and other images in patterns every day. Today wasno different.. I took a photo of a rainbow and captured a face!