Hello MagicJ
Welcome to Apple Support Communities. From what I am understanding is that on Wi-Fi calling on your Apple Watch you are unable to transfer to call to your iPhone, correct?
To confirm, would you mind if I ask a few troubleshooting steps which have may already be taken?
- Power both devices off/on?
- Disconnect and connect to Wi-Fi?
- Are you using the Phone app?
- Are both devices up-to-date on the iOS and watchOS
Update your iPhone, iPad, or iPod touch
Update your Apple Watch
Here are a couple articles on setting up and using Wi-Fi calling:
Make a call with Wi-Fi Calling
Make phone calls on Apple Watch
If the issue persists, please don't hesitate to post a reply!
Cheers!