The khabar is mansub, but its visible sign depends on the form of the noun.
Singular noun: غَنِيًّا, بَارِدًا, أَمِينًا show fathah.
Sound masculine plural: مُنْصَرِفِينَ and خَاسِئِينَ are mansub with ya.
Therefore, find the grammatical role first. Do not decide that a word is not mansub merely because it does not end in visible fathah.
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The khabar is mansub, but its visible sign depends on the form of the noun.
Singular noun: غَنِيًّا, بَارِدًا, أَمِينًا show fathah.
Sound masculine plural: مُنْصَرِفِينَ and خَاسِئِينَ are mansub with ya.
Therefore, find the grammatical role first. Do not decide that a word is not mansub merely because it does not end in visible fathah.