Here's the connection:
riding bike on kinetic roadmaster REGISTERING ACTIVITY VIA Wahoo cadence sensor + Wahoo speed sensor SENDING BLUETOOTH TO Zwift App on iPhone RESULTING IN VIRTUAL RIDE.

End ride on Zwift. Zwift sends virtual ride data to Strava.

In your Zwift profile, connect your Zwift account to your Strava account before you ride (you need to do this just one time).

It's nice to have your iPhone feeding video to a bigger screen, but not necessary. Or run Zwift on a PC, Mac or iPad.