No it would be implemented by the app. The purpose is to increase security so in case someone gets ahold of your phone while it’s unlocked, they wouldn’t be able to open Voyager and get access to your account.
I see the value, but I suspect this isn't a feature Voyager needs because the only apps that have that feature are password managers, banking apps, and Telegram/Signal --- that is, apps that are end-to-end encrypted and privacy-focused.