Android Enterprise allows you to customise the Play Store Behaviour by choosing between two modes:
Only approved apps are available (by default)
All Play Store apps are available
When using the default "only approved apps available", only apps added on Appaloosa will be available in your managed Play Store. You can add native applications (apk or aab), public applications (link to existing Play Store apps) or weblinks. Only these apps will be available and any apps not on Appaloosa will be removed from the Work Profile or the Managed Devices.
When using the "All Play Store apps available" mode, the Play Store will behave like the public one. All the public apps will be available for your users to install.
Your native apps, as well as your selected public apps and web links will be displayed in a new "Work apps" tab in the Play Store.