So my scale worked perfectly, but I was having an issue with Garmin connect connecting to Apple Health so I reset the app an in the process managed to unpair my scale. Since resetting the app it will sync a second user. To clarify I can setup the scape and sees the owner, but anyone else that is invited is not. I have tried setting it up on my device and inviting my wife, the scale only see me. So I reset it and setup using my wife's phone, then then it only works for her.
Each time we send the invites, setup the accounts, the guest shows up as a user in the app but does not appear on the scale.