The feminine -t is a marker and not a subject pronoun. In katabat Fāṭimatu, the overt noun Fāṭimatu remains the subject.
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A Particle, Not a Subject Pronoun
Feminine Tāʾ in the Past Tense: Form and Agreement
The feminine -t is a marker and not a subject pronoun. In katabat Fāṭimatu, the overt noun Fāṭimatu remains the subject.