I've not checked how it works, but I don't think Universal Clipboard pushes the data that's being copy-pasted via the cloud. I've certainly used it to copy Wifi

I've not checked how it works, but I don't think Universal Clipboard pushes the data that's being copy-pasted via the cloud. I've certainly used it to copy Wifi access codes from my phone to laptop when neither device had internet access, so I think it's implemented using peer-to-peer Bluetooth/Wifi.