Yes, the Mystic Sect's methods actually only reach to Refining Qi and Transforming God.
Simply put, the current concept of the Three Great Sects, although aware of the possibility of cultivating to a higher realm, such as the Three Venerables comprehending the Heavenly Dao, Shattering Void, and ascending to other realms, the specifics of how to shatter, how to ascend, and what the other realm is, remain widely debated and unclear.
After all, the Three Venerables actually left a lot of things unfinished, and then suddenly 'whoosh', just Shattered Void and left, and no one returned to teach everyone how to get there.
Therefore, the current cultivators can only seek 'Enlightenment' on their own, or in other words, find their own wild ways to ascend.