You Do Need power plug adapter while traveling from Vatican City to Abu Dhabi.

Here is Why You Need An Adapter

The outlet and plug type used in Abu Dhabi is G and in Vatican City are C, F and L. This is how they look like.

Vatican City

In Vatican City, outlets of type C, F and L are in use.

Type C

Type F

Type L

Abu Dhabi

In Abu Dhabi, outlets of type G are in use.

Type G