Help re-creating a scarf like dress collar on a costume Sewing Machines Parts and Sales in Los Angeles

I’m working on a muslin of a cosplay dress, and I’ve got most things figured out so far, except for where I sell my arm for quality fabric :P. However, the dress has the typical 18th century scarf going on (I’ve got that one figured out), and a strange underscarf too (scarf like object?). Does anyone know what this under piece is called or a clever way to go about making/drafting it up as I go along?

Reference image: The dress with two scarf like objects (Ignore the grumpy man in the photo, he’s my next costume, and the character has no shots from the game where she is alone and her dress is clear.)

Thanks all, happy sewing! May all your needles remain firmly attached to the machine.