Hi Crgthom,
Thanks for reaching out to Apple Support Communities.
It sounds like you're having an issue pairing your Apple Watch to your new iPhone.
We're happy to assist.
We recommend checking out the steps in the "Make sure that Apple Watch isn't already paired" section from the article here: If you can't pair an Apple Watch with your iPhone
When you set up Apple Watch, your iPhone asks you to hold the watch up to your iPhone camera. If your iPhone says that it's unable to connect to Apple Watch — or if the watch shows a clock face — Apple Watch might already be paired.
If you have its paired iPhone, unpair your Apple Watch
1) Open the Watch app on your iPhone, tap the My Watch tab, then tap All Watches at the top of the screen.
2) Tap the "i" button
next to the watch that you want to unpair, then tap Unpair Apple Watch.
3) Tap again to confirm, then wait for the watch to unpair.
4) After Apple Watch unpairs, you can pair again.
We're recommending the steps above because they directly address the issue you initially posted about: you cannot pair your Apple Watch to a new iPhone.
Please let us know the outcome after giving the above steps a try.
Cheers!