Try to force your phone to use a WiFi 2.4 GHz channel. This is what finally fixed my watch. I have a mesh network so I had to go into the router settings and force 5.0 GHz channel off, you may have a separate 2.4 GHz channel you can join. Good Luck!

Try to force your phone to use a WiFi 2.4 GHz channel. This is what finally fixed my apple watch 3. I have a mesh network so I had to go into the router settings and force 5.0 GHz channel off, you may have a separate 2.4 GHz channel you can join. My full steps are in a post below. Good Luck!