Plasma lets you generate a QR Code by copying something to the clipboard and clicking on the QR Code button. It is able to display the QR Code, and the QR Code happens to be draggable.
It seems we are very close to add a Save button there, which would be incredibly convenient :-)
My problem for years has been that people still ask me for business cards even though I stopped carrying them in like 2005.
Turns out there is a package called qrencode in the Debian repositories so this is as simple as:
$ sudo apt install qrencode
$ qrencode -o linkedin-qrcode.png 'https://www.linkedin.com/in/myprofile'
Plus a few others, personal website, company website etc. All copied into a Google Drive folder as you suggest.
Next time someone asks, boom pop out the qr code.
Brilliant. Thank you.