From f-droid:

Shelter is a Free and Open-Source (FOSS) app that leverages the “Work Profile” feature of Android to provide an isolated space that you can install or clone apps into.

For a full description, please read from the Git repository of Shelter. A summary is provided below.

The main use-cases of Shelter include:

• Installing apps inside a work profile for isolation
• "Freeze" apps inside the work profile to prevent them from running or being woken up when you are not actively using them
• Installing two copies of the same app on the same device