How to create desktop shortcut after install application from store?
Drag & Drop from Start
You could drag the app from start menu to desktop, it will generate shortcut automatically.
Create shortcut with File Explorer
Press Win + R to bring up the Run dialog and type: shell:AppsFolder
and hit Enter or click OK. Select the app right click then select create shortcut in the popup menu.
Please note :
currently there is no such api could create shortcut programmatically.