Hi, Brad.
Thanks for reaching out about your situation moving your Nest to a new home. I imagine with everything going on the last thing you want to worry about is getting your network sorted out. I'll be happy to help you here.
So the good news is that you don't actually need the QR code. Also, if you move the network and use all the same network password and name, everything will connect.
If you do need to set up the network again from scratch,
here's how to handle those points or the router if the QR code is missing.
If you need anything else or this doesn't work for you, please let me know. Thanks, and good luck on your move!
- From Jeff