Gotta admit I didn’t read every post here, but isn’t the thread initiated by someone just asking if others are experiencing it? And not that super close up photography is hugely important to me, but is it really beyond reason to expect the iPhone 12 Pro to do something the iPhone 11 could?The only thing you’ve proven is that different lenses have different minimum focusing distances.
To quote one reviewer on YouTube, “The iPhone 12 Pro has a slightly greater minimum focusing distance than the iPhone 11 Pro.”
Once again, before you conclude that something is a bug or a malfunction, you should check the specs and make sure what you’re seeing is not expected behavior.