These days it does just that, it'll say null or whatever if you give it the option. When it does make it up, it tends to be limitation of the image qualify ( max dpi).

Blotchy text and specific typeface make 6's look like 8's, even to the non-discerning eye, a human would think it's an 8, zoom in and see it's a 6.

Google's image quality on uploads is still streets ahead of openai for instance btw.