Firstly, I’m not familiar with visa requirements in DR.
She won’t need a DR passport, but she may need a valid exit visa/stamp in her US passport.
This is the case in Cambodia when exiting for the first time on a foreign passport. We had to do this for my son (dual AU, KH citizen) when we flew out for a holiday when he was 3m with his new Australian passport. Had we had his Cambodian passport at the time, he could have travelled on that and the exit visa would not have been required.
Firstly, I’m not familiar with visa requirements in DR.
She won’t need a DR passport, but she may need a valid exit visa/stamp in her US passport.
This is the case in Cambodia when exiting for the first time on a foreign passport. We had to do this for my son (dual AU, KH citizen) when we flew out for a holiday when he was 3m with his new Australian passport. Had we had his Cambodian passport at the time, he could have travelled on that and the exit visa would not have been required.