In order to deploy and manage public apps from Google Play inside the Knox Container, Android and the Google Play Store needs to be enabled through the Workspace ONE UEM console.
To confirm Android and Knox Container setup, navigate to Google Admin Console Settings and Google API Settings are enabled. Samsung Knox should also be enabled under the Hub Settings tab. Use the Passcode profile to create a Samsung Knox Container passcode which prompts from Knox container creation. Add and approve public apps and use smart Groups to assign to devices.to confirm
For more information on configuring Samsung Knox License Key, see Enable Samsung Knox Container.