If you mean you want the quality to be better than what you've found (clearer video/audio or better translation), your best bet is to find a high-quality 1080p/4K Korean or English source and then add separate Mongolian subtitles if available.
– Some local platforms like www.medee.mn , www.bolod.mn , or www.dug.mn sometimes upload Korean movies with Mongolian subtitles. Search for: "Бурдтай хамт 2" монгол хэлээр or "Along with the Gods 2 mongol heleer along with the gods 2 mongol heleer better
Many viewers find the sequel more engaging because it moves beyond the repetitive trial format of the first installment to weave a multi-layered story. If you mean you want the quality to