Why is my Apple Watch not showing VO2 max results?

Did you use the Apple Workout app on your watch and start a Walking Outdoor exercise?

If this has been one to the first times you exercise to get a VO2 estimate, the Health App needs a couple of those Walking, Running or Hiking Outdoor workouts to show a result.

Have a look at the related article:

Track your cardio fitness levels - Apple Support

If your Apple Watch Series 10 isn’t showing VO2 max or tracking the 6-minute walk, it could be due to calibration issues or incorrect settings. Make sure you’re doing the right type of workout, such as outdoor walks or runs, and that your watch is snug for accurate readings. If the problem continues, contact Apple Support.

[Edited by Moderator]