The feature exactly like that exists in Xiaomi phones. It's called Second space, and basically allows you to have second profile with different apps or accounts. Interesting thing is that you can set it up to open when unlocking the phone with specific fingerprint. The idea is to fill that Second space with dummy info, and unlock it with your little finger, for example (or vice versa, use it for sensitive information). Obviously, it wouldn't fool thorough phone scan (and if you dig deep enough in the settings you can see if the feature is enabled) but can be useful at quick cursory scans, like if you need to provide your phone at the border