Your runs and Apple Health
A run has not appeared yet
Pull down on Activities to check Apple Health again. Its top line says when Why Not last checked.
A run from a Garmin, COROS, Polar or Suunto watch reaches Apple Health only after its own app syncs, often only when you open that app. A Why Not watch run reaches your phone when the watch is near it and the app opens.
If it still is not there, check that Why Not can read Workouts from Apple Health.
iPhone Settings, Privacy & Security, Health, Why Not: turn on Workouts.