It's similar to https://developer.apple.com/forums/thread/662935.
This Demo - https://github.com/ewalk40/WatchConnectivityDemo is work on simulator but doesn't work on my device.
Details of my devices and Xcode:
iOS version: 14.0.1
WatchOS version: 7.0.1
Xcode version: 12.1
Topic:
App & System Services
SubTopic:
Core OS
Tags:
watchOS
WatchKit
Watch Connectivity
Apple Watch