Share activity with Apple Health

Zwift runs on iPad, Companion App on iPhone. Companion App has all permissions to write to Apple Health. But my activities are not synced to Apple Health. Why?

I am having a similar issue. I run Zwift on my Apple TV, Companion App on my iPhone. No data has ever been synced.

When I go to Apple Health > Sharing > Apps > (Zwift) Companion, all I see is “Data from Companion” which shows nothing. If I do the same for Ride with GPS, I not only see Data from Ride with GPS, I see options to allow writing cycling distance, heart rate, and workouts, and an option to read heart rate. I have none of those options for Zwift Companion. I am not using an Apple Watch.

How do we solve this issue? Thanks.