Are you using WFS 1.5.7 or WFS 1.3.13?
With 1.3.13 ** Small question about WFS 1.3.13 and Galaxy Watch 6 - #9 by isaacok0919**
WFS 1.5.7 is pretty straight forward you do that in the Run On Windows settings
On Watch click on settings then developer option
Turn on ADB debugging and ok that
scroll down to where it says WirelessDebugging tap on it
wait few minutes and
write down the IP address followed by :xxxxx the port number
Then click on Pair with new Device (apparently you have to do this ever day )
it will have a pairing code
followed by the IP port and a different port number
Run on Device
fill in the IP address in the top
Fill in the first port number when you first turned on ADB Wireless deguggin
Fill in the Pairing code
Fill in the last port number when you paired the device
it also asks if you wish to add this device the first time and you have to OK it.
Ron
Samsung Developer Relations