Neat. You can find more supported QR codes for iOS here-- https://developer.apple.com/videos/play/tech-talks/206/ (I couldn't find docs but you can skip around the video, starts at 1:11).
https://9to5mac.com/2018/05/16/how-to-qr-codes-ios-11-iphone...
The shortcut is just regex match the base station, password and security from the text 1Password shares, then format it as WIFI:S:<ssid>;T:<security>;P:<password>;; and then pipe that to the Generate QR code action.