Is it Possible to Open a New Window in Slide Over Mode?

Our iPad app supports multiple windows. Currently, we use openWindow in SwiftUI to open an 'Add New Item' window so users can fill in the information of the new item by drag and drop from other apps.

However, we believe it would be more intuitive and convenient for users if we could open the window in Slide Over mode, instead of having users do it themselves. Currently, a newly opened window in iPad is by default set to split view.

Is there a way to achieve this?

Many thanks!