The ordination was as a śrāmaṇerī, or novice nun, the highest level of ordination available for women in the Tibetan tradition at the time because the bhikṣuṇī sangha had never been established there.
In Tibetan Buddhism, women could only attain the highest level of female monastic status as a śrāmaṇerī, or novice nun, due to the absence of a fully formed bhikṣuṇī sangha in that location at the time.