You Do Need power plug adapter while traveling from Oman to Maldives.

Here is Why You Need An Adapter

The outlet and plug type used in Maldives are C, D, G, J, K and L and in Oman is G. This is how they look like.

Oman

In Oman, outlets of type G are in use.

Type G

Maldives

In Maldives, outlets of type C, D, G, J, K and L are in use.

Type C

Type D

Type G

Type J

Type K

Type L