Viki is a fan-favorite for K-Dramas. While known for subtitles, they have begun offering Hindi dubs on select popular shows under their "Viki Originals" or licensed dubs. The community there is also very helpful for finding dub info.
Currently, most Hindi dubs arrive weeks or months after the original Korean broadcast. Why? Because dubbing is a complex art—it requires translating nuance, casting voice actors who match the original actors' energy, and mixing audio. Time-S1-EP16--Hindi-Korean DUB-ESub--KDHindiDub...
Hotstar has dubbed several classic K-Dramas into Hindi, especially those that aired on its now-defunct Korean channel. Check for older titles like Flower of Evil or Dr. Romantic . Viki is a fan-favorite for K-Dramas