@lalajee, Thanks for posting in Q&A. From your description, I know clock app is not installed on Android Enterprise enrolled devices.
To deploy the clock app to Android Enterprise enrolled devices, you can add a Managed Google Play store app, Seach clock app, then select one clock app you want. After the app sync to Intune, then we can assign the app to the user or device group we want to install the clock app.
To add the clock app to the default home screen, we can long press on the clock app and choose "Add to home".
To do this via Intune, based on my researching, I didn't find the policy to do this. Currently, in Intune, we use Microsoft Launcher app or Managed Home screen to manage the home screen. If you want to use Intune to manage the home screen, you can consider these apps.
https://learn.microsoft.com/en-us/mem/intune/apps/app-configuration-managed-home-screen-app
https://learn.microsoft.com/en-us/mem/intune/apps/configure-microsoft-launcher
Hope the above information can help.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.