https://api.client_name.vitruvi.cc/api/v1/engineering/design_elements_work_items/?segment=3&regions=115,52,120

something like that should return the list of design elements

that should include category_name and feature and region_name for each design element and materials and status then when you select one, we need to be able to get the work items associated with that design element

...

if work items were in a separate call it would be https://api.client_name.vitruvi.cc/api/v1/engineering/elements/{pk}/ and that should get the work items