She did not know that it was obligatory to do ghusl; does she have to make up the prayers?

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Check below answers in case you are looking for other related questions:
He did not know that ghusl from janaabah is obligatory; should he repeat the prayers?
Does touching the penis invalidate wudoo’

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Related Answers:
A woman does not have to sit when doing ghusl
She sees disturbing dreams, and she imagined having intercourse in her sleep
Is it permitted to bathe naked?
He did not know that ghusl from janaabah is obligatory; should he repeat the prayers?
Does touching the penis invalidate wudoo’

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Delaying ghusl from janaabah in Ramadaan until the sun has risen does not invalidate the fast