Sync Strava and/or Garmin

I have Garmin setup to sync with Strava for all my rides.

Should I keep like that and just add Garmin sync within Zwift?

Or, should I Sync Zwift to Garmin and Zwift to Strava?

I synch both to Zwift ,had no issues

I know this sounds crazy, but where do I find the settings menu where I link my Strava and Garmin account on the Zwift app?

In the companion app click the 3 bars in the top left . Then settings
Them connections.