Use a separate profile on the device.
I am not sure if the device can be locked down so that one profile cannot access the other profile.
Certain devices have a 'guest mode' available.
This is the other profiles area.
The main profile, yours, is dominant.
There are provisions for multiple other profiles that each have their own set of apps (system app datas and any others that are installed in that profile).
The data between the apps in the profiles cannot be accessed except when using their respective profiles.
When this is no longer needed, the extra profile(s) can be deleted- which removes any data and 3rd party apps under that profile.
Settings
System
Advanced
Multiple users
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