Hey @Wendy319, 
Thanks for your post! The Flyby feature on Strava is available on your activities when both of the following conditions are true:

• Your activity's privacy control is set to 'Everyone'. Please note that the individual activity's privacy control is different from the default activity privacy control found in your account settings. More information can be found here: Activity Privacy Controls


• Your account's Flyby privacy control is set to 'Everyone'. This setting is found on your Privacy Controls settings page on the Strava website or via Settings → Privacy Controls in the Strava mobile app.

If either of the two settings described above are not set to 'Everyone', you will not see the Flyby feature displayed on your activity.
 
Additionally, an activity whose map has been entirely hidden by its Map Visibility settings will not be eligible for Flyby. Learn more about editing your activity's or account's Map Visibility settings here: Edit Map Visibility
 
If your activity matches the above and it's still not working, please submit a support ticket and we will investigate further.

I did exactly what you suggested, then did a new activity but it didn’t show the flyby so I reverted back 😣

Hey @Wendy319, 
Thanks for the follow up. We're going to send this over to our support team so they can look into this. If you have a similar question please submit a support ticket and we will investigate further.