In the Name of Allah, Most Merciful & Compassionate

There is well-established scholarly consensus (ijma`) that missed obligatory prayers must be made up. [Nawawi, al-Majmu`]

See:

Scholarly Consensus on Making-Up Past Missed Prayers

Not Making Up Missed Prayers: Is it an option?

Nawawi on making up missed prayers: scholarly consensus

My Mother has 30 Years of Prayers to makeup: Can she make the expiatory payments instead?

Missed Prayers

Missed Prayers: Hanbali Dispensation?

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