Are moose used for work near the kingdom of Arendelle?
Let’s work this out in a step by step way to be sure we have the right answer.
yes
The opening scene of Disney's Frozen shows a group of ice breakers.

They have moose that carry the heavy ice blocks.

One of them, Kristoff, becomes separated with his moose Sven.

When Queen Elsa flees Arendelle and Princess Anna gives chase, she quickly encounters Kristoff.

.

So, the final answer is yes