how to synchronize activity data between Apple Watch and iPhone

Hey elsiefromvirginia,

Thanks for using Apple Support Communities. If you're not seeing your Activity data syncing with your iPhone and Apple Watch, complete the following:

• Ensure both your Apple Watch and paired iPhone are updated as updates help by installing bug fixes and includes security updates. If an update is needed, back up first:
  • Update your iPhone or iPad - Apple Support
  • Update your Apple Watch - Apple Support
• Be sure your health information has been added: Manage Health data on your iPhone, iPad, or Apple Watch - Apple Support
• Calibrate your Apple Watch for improved Workout and Activity accuracy - Apple Support

If those steps don't help, you'll want to reach out to Apple Support directly to look into this more with you: Get Support

Take care!