Hey Sasi,
Carefully examine all the items in the Edit menu of the Keyboard Maestro Editor that start with “Insert”. Note all the keyboard shortcuts.
I always use the Insert Action by Name function to work with Actions, unless I'm using KMFAM or my own Insert-an-Action macro.
MACRO: [KMFAM] Favorite Actions and Macros v1.4 Released 2021-12-09
Macro: Pause Until Web Page Element Exists [Example]
-Chris