That's so great we can plaster logos in the center of it without any reasonable considerations and it would still work, so that's now abused by many apps and services. No, they weren't designed to do that, it's just a random obstacle, like a dead bug, that doesn't obscure the reading too much. Trully impressive.
I don't think any error correction is done upon this QR code when it is read. Just some camera/image manipulation to figure out the correct way to process it. Error correction is meant for damaged QR codes. I tried looking for an app that shows how much error correction it used to read the QR code, but couldn't find one.
My friend cross stitched a QR code as a tree ornament and gave it to me for Christmas. It worked, and it sent me to a ridiculous meme video. I admire his dedication to the joke.
My wife did a quilt like this. As a note for anyone else trying something like it, be sure to leave a generous border. It doesn't always scan reliably without a good border.
Well crocheting is something that I associate in my head with my mother, I can't help but be impressed by this just so much. Well played mademoiselle, well played.