An individual finished product cannot ungroup. For multiple finished products, you can operate according to the following steps:

Grouping: Hold down the Ctrl key, left-click the items to be grouped with the mouse cursor. After the selection, press Ctrl + G;

Ungrouping: Left-click the grouped items with the mouse, and press Ctrl + B to ungroup (Before ungrouping, you need to first check if it is grouped. Only when there is a white large frame/blue frame displayed is it grouped. Only grouped items can be ungrouped)