Take a look at this:

https://www.privacyguides.org/en/android/general-apps/

Shelter is recommended over Insular and Island as it supports contact search blocking.

When using Shelter, you are placing complete trust in its developer, as Shelter acts as a Device Admin to create the Work Profile, and it has extensive access to the data stored within the Work Profile.

I also remember starting with island but changing to shelter because it supports app pausing without using a third party proprietary app to pause work apps