@Abhijeet_88
Actually i would like to figure out if you're adding the smart plug itself as a widget, or did you add it to a Shortcut, and then add the shortcut as a widget instead? How to create Smart Action (automation or a shortcut) of my Tapo devices
A Shortcut can control multiple devices with a single click, when the desired device operation is added.
For example, a Shortcut for movie night can be created like this.
1. Turn off ceiling lights.
2. Turn on background light strips and set to 30% light blue
If you're adding Shortcut as a widget, we need to check what the device operation you added. If the action of the smart plug is set to Turn On in your shortcut widget, you will never turn off the smart plug by using this widget.