Tap print button, and select compatible printer.
Tap share button, and select Print menu.
Available printers for printing QRcode are the following two types.
Tap print button, and select compatible printer.
Tap share button, and select Print menu.
Bluetooth compatible printers are the following one only.
This is small thermal printer, so you can carry it like a stationery. It's the best for printing QR code.
Many major printer manufacturers sell AirPrint compatible printers, so please use your favorite model.