I want to switch devices, install the app, put in my password and have all my codes sync'd into the app directly. I don't want to bother with scanning 50+ accounts (I use 2fa for everything), by hand in the name of pseudo security. After 2+ years, that feature should be fixed.
But that is what happens, when you use the icloud backup. You log in, you you create a new passcode, and the app automatically looks in your icloud folder for a backup, then restores it automatically. There is no account creation involved in the process. What you are asking for already exists.
What you are asking for is the manual backup you create to automatically restore.