Welcome to the Forum, @blackdragon0480! 
If you didn’t select an image for yourself (the main user) when you created the different user profiles, then the app will default to a “WYZE” user icon. The problem (okay, one of the problems) is that this icon is light text on a light background, and the Scale S module within the app uses a light background even if you’re trying to use the Dark Theme.
It’s kind of a pain in the 
. It’s a serious failure from a usability/accessibility perspective.
What happens if you navigate to the main Scale S screen within the app and tap just to the left of the 
in the upper-right corner? When I do that, I get a drop-down menu that shows my e-mail address and the names of the three pets whose weight I’ve tracked.
I think that’s what you’re seeking. If it isn’t or if a screenshot would be helpful, then please let me know.