Assignments
You do not have to assign dependent apps; Intune automatically targets and installs them based on the app relationships that you create.
Install Status of Dependant Apps
The install status of a dependent app will be displayed within Intune only if the app is targeted to the user or device.
Deletion
Win32 apps added to Intune can’t be removed while they are in a dependency relationship. These apps can only be deleted after the dependency relationship is removed
Source
https://learn.microsoft.com/en-us/mem/intune/apps/apps-win32-add