Wyze Scale Ultra

I just purchased the Wyze Scale Ultra, which I like very much. It’s quick and fairly accurate.

I have three questions.
First, is the metal bar in the middle of the scale meant for something or is it just cosmetic?

Second, will the scale eventually support Samsung Health app?

Finally, I went through the Share settings to share with my partner but what does that actually means? I go to the app and neither of us see each other’s info. Am I missing something?