We do have Subject as a Hierarchy type of System Entity in CRM. Subject lookup field is always present on Case forms for the purpose to solve the type of issues. This subject field contains OOB PCF control ("SelectionTreeView Control") in background that work on hierarchy of data and show us tree look alike structure and select one of them to relevant.

However this same PCF control doesn't work with any other lookup field.

It would be useful to re-utilize OOB PCF control to show tree hierarchy and reduce amount of time as well as customization work on CRM.

It would be great to add this ability to use "SelectionTreeView control" to any other lookup field within CRM.