As shown in this bar chart published by the International Federation of Robotics (IFR) in its World Robotics 2022, South Korea continues to lead the world in industrial robot density (robots installed per 10,000 employees). It leads by quite a large margin over Singapore, Japan, Germany and China, the next top ranking countries. As explained by the IFR "The Republic of Korea hit an all-time high of 1,000 industrial robots per 10,000 employees in 2021. This is more than three times the number reached in China and makes the country number one worldwide. With its globally recognized electronics industry and a distinct automotive sector, the Korean economy profits from two large customer industries for industrial robots."
Another graphic provided by the IFR shows the overwhelming importance of the ICT and Automotive sectors in Korea's industrial robot installations. For those interested, the full World Robotics 2022 report provides similar data for other countries, allowing comparative analysis.