why do not flybys work on Strava ?

i would like to see who I zwift with …

It’s a Strava issue, not a Zwift issue.

You can read more about the issue and follow progress on Strava’s site:

https://support.strava.com/hc/en-us/articles/360000027224-Zwift-activities-not-grouped-or-appearing-in-Flybys

 

thx for the info