yes, it is possible. The displayed screen near the hierarchy tree corresponds to the defined Business View, which has Browsing Form defined. This Form can contain in its first Tab an Embedded Collection that points to the desired child entity. This will display a collection of children, based on the selected record in the tree, like this :
Child Collection displayed when a record is select in the hierarchy
This can be done for all transitions of the business view. Here are some screenshots of the configuration in case it helps :
Browsing Form defined for the root transition of the Business View
