There are 2 QR codes.
Both are to be scanned from using a QR scanner on your phone, not the watch.
NEVER install Wiiwear app from the play store. It’s out of date.
Go to the Assistant app on your watch.
Open “connect phone” and scan the first code to install the Wiiwear app if you want it.
Then hit return or back and then you will be able to use the tethering QR code to pair the watch to the phone.
You do not use the phone BT settings for pairing.
But to be honest you are better off using Watch Droid. And then you can use the tethering QR code to connect if you want.
Wiiwear and WiiWatch are soon to be removed from the play store anyway.
Watch Droid is far superior.
It’s here on the forum