There is no trusted devices that you can manually choose NOW in TWO-STEP AUTHENTICATION. It sends 6 digit code to all iDevices and Mac wherever you sign in with your Apple ID. It is annoying as **** because it wakes up my kids if I left my iPad at home and try to log in Apple ID at work.
You are showing me the old TWO-STEP VERIFICATION. At that time, you can choose where to send verification code. It was 4 digit. But now I can't.
The new TWO-STEP AUTHENTICATION and the old TWO-STEP VERIFICATION are different. I don't care if they are trusted or not. I just want to send the verification code to the devices/mac I want like as before.
Perhaps you should understand why I rant if I have to comfort my 1 year old whenever I want to login.
See:
Two-factor authentication for Apple ID - Apple Support
Yes. Two-factor authentication is a new service built directly into iOS, macOS, tvOS, watchOS, and Apple’s web sites. It uses different methods to trust devices and deliver verification codes, and offers a more streamlined user experience. The current two-step verification feature will continue to work separately for users who are already enrolled.