This is my first white series 2-1 install. I do not understand why the Master Bathroom show two tabs in Apple Home. How do you make it not display the tab on the right?
I have the same issue. It’s a bug that surfaced since the first dev beta of iOS 18.2. It happens the same with other brand switches too which also have the configuration companion and also not able to get it to not display on the Apple Home main screen.
Hoping Apple fixes this new bug (only started in 18.2). I didn’t download iOS 18.3 dev beta 1 yet to see if they fixed it there yet.
So I’d suggest submitting bug report to Apple.
Example of one of my switches too 
