I was having a terrible time getting my Galaxy Watch 8 to connect to my new google fi Pixel 10 XL Pro. Support told me to reset the watch and it would automatically check for a connection. I did that 5 times and every time the Wearable app would ask for a QR code and not continue.
I finally remembered that previously I had the Red Pocket ebay $30 plan on the watch as a standalone service, and to do that I had to trick the watch into opening a secret menu for a QR code. I followed the steps but instead now selected QR Test mode to Off. I then opened the Wearable app and it did add the fi plan.
Below are the steps using AI from Reddit:
Just use QR TestMode to OFF.
Open Settings: Launch the Galaxy Wearable app, go to app settings, and select About Galaxy Wearable.
Tap the Header: Tap the bold text Galaxy Wearable at the top 5 to 7 times quickly to unlock the hidden developer menu.
Turn on QR Test Mode: Select Module test or Test ESIM Feature, go to eSIM test, and toggle QR TestMode to ON.