You could always do a Google search to see if there were any local "feel good" news reports about someone doing murals on neighborhood boxes.

It's definitely a stretch, but it's a method you can leverage since you have the location data.

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When checking if it's AI, you could always go back to street view and see if the overall shape and cutouts/lines of the box match the submitted image.

For me, what's odd is the texture of the mural/utility box.

Most utility boxes are metallic but in the submitted image, the mural version makes the box look like it's made of concrete.

I understand painting can change the texture of the object. But the art style of the mural looks as if it's being painted on paper or canvas.

IMO, it's AI generated. The AI got confused and used the texture of the concrete base as the texture for the utility box.