A QDRO simply effectuates the division of the pension that was granted in the divorce decree. Nevada is a community property state, so all property is equally divided unless there are specific findings as to why an unequal division is appropriate. This applies to all retirement accounts as well. A QDRO is still required directing the plan to pay the alternate payee their share of the pension.
A QDRO is important to file so that the former spouse receives the benefits from the retirement account as they are entitled. They do typically come up during a divorce as the spouses are accounting for their property and determining how things will be divided. If you didn’t file one during your divorce, however, get one filed as soon as possible afterward.