Ben Sandofsky, Halide blog:

The iPhone 13 Pro features a new camera capable of focusing closer than ever before—less than an inch away. This opens a whole new dimension for iPhone photographers, but it’s not without surprises. Let’s take a tour of what this lens unlocks, some clever details you might miss in its implementation, why its “automatic” nature can catch you off guard, and much more. At the end, we have a special surprise for you — especially those not using an iPhone 13 Pro.

This post is way more than just a collection of macro photos, though it does have plenty of those. It’s a well presented tour of how macro works, full of detail/examples and, as Ben implies above, there’s a nice little surprise towards the end (hint: it’s a product announcement, one that you’ll find compelling if you are interested in macro photography).