At the moment we don’t have a specific full height option for that.
While it is not supported at the moment, you are welcome to share some more details about your use case so I can create a feature request and add your voice to it.
You can use the height option, which represents one item’s height in pixels. You could calculate the item’s height based on the window size.
Here is the documentation for the height setting: https://docs.mobiscroll.com/select#opt-height