Luckily for me these families basically only have type parameter controls.
I’ve managed to get the geometry and create detail lines from it but it creating them in a different place than the detail component. I think I know what to do tho as you mentioned it here: Get Geometry of a family which has detail item
It’s also not created filled regions and symbols from the detail component. We might be able to live with that as they are not too common. Although if I could create symbols using this it would make editing diagrams more consistent.