Hi Vijay
I don't think this is possible with Applescript. The scripting support for Acrobat was deplorable 10 years ago when I wrote about GUI scripting in Acrobat (https://macgrunt.com/2011/10/25/gui-scripting-acrobat/). And it looks like it has not improved at all in that time.
You got your script to open the Action Wizard from the menu. But the resulting UI is not recognised by Applescript.
You can see this by running:
tell application "System Events"
tell process "Acrobat Pro DC"
return UI elements
end tell
end tell
You'll see that the only UIs recognised are 'window' and 'menu bar 1'
Menu bar 1 is the one you addressed in your script, so no help there.
If you run: return UI elements of window 1
You'll find that nothing useful is returned.
Applescript just does not recognise the Action Wizard as a scriptable interface.
m.