Hi @jjqf
here in Venezuela I have not seen products that follow that characteristic, but there are products from other countries that are marketed here, in which it is seen; One of them is the Fructus (known to be toxic for human consumption) and precisely here I show you a photo of its packaging with its QR code.
I do not know if some people have complained, I tried to scan the code and it did not work because of connection failures, in any case I consider it very interesting that companies are starting to give a rational and productive use to the blockchain and I think it is a breakthrough very good important. Great post!