If there are buildings similar to ancient palaces in contemporary North Korea, I think there are.
Every country has its own history and culture, and they will not tear down such palaces at will, just like the Yuanmingyuan in Beijing was burned down and finally stayed and became a contemporary site.
Is the palace in North Korea built in South Korea or North Korea? At that time, the emperor of North Korea was referred to as the king for short, and his palace had a new name "Moon Watch", which was located in North Korea and covered an area of more than 30,000 square meters.
Even in contemporary times, it may just be a ruin for tourists to visit. The so-called crystal silver ornaments, there have been so many grave robbers in recent years, and it is almost the same.
If it is aimed at the back, were there any palaces in ancient Korea? There must be.
It is inconsistent to call it a palace. The ancient emperor of China lived in the Forbidden City, and some other minority tribes called the emperor's village. Moreover, the person they call the supreme ruler is not the emperor, but the king or king XXX.
Interested in this piece, you can search for specific details online. For example, what was the name of the place where the supreme ruler of ancient Korea lived? What are the palaces in North Korea and what are their names? What year was it built? Where are those sites scattered?
Finally, I want to say that every country has its own palace. Otherwise, where did all those powerful people in ancient times live? Many years ago, there was a TV series called Dae Jang Geum. You can learn about it.