«وَكَانَتْ مِنَ الْقَانِتِينَ»
And she (Maryam) was among the devoutly obedient.
The referent of kanat is feminine, whereas al-qanitin is a sound masculine plural. Qunut, devout obedience, can characterize women and men, yet the inclusive group is expressed through the masculine plural form.
Predominance concerns the morphological form, not a claim that devotion belongs only to males.