iOS Companion App URL - Garmin store

So when putting an app in the store there is a place to enter 'iOS Companion App URL '. I get this error

  • iOS Companion App URL is invalid.

In my case it is a related app, but does not communicate directly with the garmin device.

Regardless this companion is key to the usage and setting up.

I was able to enter an android companion but cannot figure out what is needed for ios so for now i have to leave it blank.

Any tips on what the validation in the garmin store is needing for an acceptable url?