Today, you can add more than one list member on a worksheet via a "right-click" > Insert multiple items. However, you cannot do this same action on a board without creating an Import action that temporarily locks up the model. This impacts model builders and architects when designing UX pages and all end users needing to add list members for a particular use case.
In the future, we would like to be able to be able to do this exact functionality ("right click" > Insert multiple items) on grid cards within Board pages so we can limit the amount of screens needed to design/build and screens to jump to and from for end users.