Once you have added content to your artboard, either in XD or by opening a Photoshop file, you can create new artboards using all or some of that content. If you only want to copy a few elements rather than duplicating the entire artboard, or if you want to fill a blank artboard, you can copy content elements simply by holding down the Option/Alt key and dragging and dropping the content from one artboard to the other. Dragging content within the confines of an artboard auto-nests the content in the artboard. If you drag content associated with an artboard outside the bounds of an artboard, the content will no longer be nested within it.
Another way to copy an element is to select it and use Command/Ctrl-C key to copy. Then click the artboard where you want to place that element, and use the Command/Ctrl and V keys to paste. If you need a temporary space while you move elements around, you can use the area around the artboards. Place any element outside the artboard and then copy or drag and drop them to the artboards when it’s time.
A third way of copying content is to use the Layers panel to move or copy content layers from one artboard to another. The advantage of doing it this way is that the moved content will be automatically placed in the same relative position in the new artboard as it was in the artboard it came from.