It is 2021 and Android still doesn't have a QR code scanner by default.
Android is like Forrest Gump's box of chocolates: you never quite know what you're going to get. And sometimes it's stale.
I downloaded an app for it because it never crossed my mind it would be built into the camera app. After all I don't want to take pictures of the QR code, I want to decode it...
No idea when it was introduced. I've had an S3, S5 and now an S8 where I discovered it by accident last year. Pretty sure the S3 didn't have it.