Add Field: Status of the referenced Webform

My use case is a list of events (nodes) and I want to show a label on the views item, if the event is already booked out. Therefore I would render the status of the referenced event registration webform (entity reference field in the node).

Via a reference in the view, I get all the input fields of the referenced webform as fields for my view. But not the status of the referenced webform (open/ closed).

Can someone add the webform's status as a field for views?
Or is there maybe another option via YAML?

Thanks in advance!