Viki is the go-to destination for K-drama fans. While they are the primary license holder for The Bride of Habaek , the availability of Hindi audio specifically depends on your region. In many cases, Viki provides subtitles in multiple languages rather than full dubbing.
Similar to MX Player, JioCinema has been expanding its library of Korean content with Hindi dubs. It is worth checking their catalog to see if The Bride of Habaek has been added to their roster. the bride of habaek ep 1 hindi dubbed link