I got it to work with a shortcut: https://www.icloud.com/shortcuts/d4793e08d64d4ff1b7ea725b944...

That is seriously cool, didn't know those could do that haha

Whats that doing? I get some error about some gallery???

You'd need something like https://qrscanner.org/ because most phones suck at scanning larger QR codes.

Also, it won't work on your phone, can't put in that compatibility with size restraints, sadly

Sure if the parser is broken anything might happen.

Historically there have been exploits for Sony's PSP using modified .tiff images or an exploit for the Nintendo 3DS where a modified .m4a file could be used.