On mobile we have not implemented possibility to generate a global QR which you can use for importing all the missing keypairs at once
At the same time you can still generate QR code for each key pair and import it one by one on Desktop

I’d suggest hiding the option to import all keypairs via the Global QR code on Desktop, as well as the ability to generate such a code (at least until we decide to implement this feature on Mobile). This would help avoid confusion and ensure consistency between Mobile and Desktop.