Hi @zmsoft ,
Identify the Shell Item:
First, identify the shell item you want to interact with. You can use the Get Details of SAP UI Element action to locate it within the SAP GUI.

Select the Shell Item:
Once you’ve found the shell item, use the Click action to select it. This simulates a left-click on the item.

Double-Click:
To double click SAP doesnt have direct action ,you can Click UI element in the window action.

(Note:- if you got your solution you can mark as solution and gives kudos)
Thanks & Regards
Vishnu Reddy