To do so, you must add the application package names under Applications that the user can/cannot install and set the State column for the specific application package names as Allowed.
Hence only the ones in this list marked as Allowed can be installed and are exempted from the “Prevent installation of applications” policy.
SDS IAM & EMM
How do I allow the install of certain applications when using the “Prevent installation of applications” policy in Samsung SDS IAM & EMM?
The 'Prevent installation of applications' policy prevents the device from installing any application, even the ones that are pushed from Samsung SDS IAM & EMM console. However, you can make an exceptions to that by allowing (whitelisting) applications based on their package name.