In Hanafi law, sujud al-sahw is wajib, not itself a fard pillar. It compensates for specified inadvertent omissions of obligations, but does not replace a missed essential pillar.
If a fard component was omitted altogether, two compensatory prostrations cannot by themselves make that deficient prayer valid.
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Prostrations of Forgetfulness: Causes, Method, Missed Sittings and Doubts
In Hanafi law, sujud al-sahw is wajib, not itself a fard pillar. It compensates for specified inadvertent omissions of obligations, but does not replace a missed essential pillar.
If a fard component was omitted altogether, two compensatory prostrations cannot by themselves make that deficient prayer valid.