...rather that beeing a further Attachment.
Hello Team, I talked to @mayanknahata007 about this earliert this morning....
I know from integrating Logos in ERPNext that it is often done by adding a PNG some where and then referencing the PNG in a HTML code part.

Maybe we could use a similar process to have the QR-Code part stick to the lower end of a Printformat?
So this part...

...would be a PNG attached to the doctype and then pulled into the Printformat?
@akazyti @grynn-in what do you guys think?