Is it obligatory to repeat the prayers I performed after ghusl from menstruation, knowing that the ghusl was before seeing complete purity, then purity became evident thereafter, and there is doubt about the nature of the first discharge after ghusl?

Yellowish or brownish discharge connected to blood is considered menstruation, based on the statement of Aisha, may Allah be pleased with her: "Do not hasten until you see the white discharge (al-Qassah al-Bayda')." The ghusl (ritual bath) is required only after seeing complete purity. If a woman performs ghusl before ensuring purity, her ghusl is invalid, and she must repeat it, along with repeating the prayers she performed after achieving purity but before performing ghusl.