In an adversarial system, appellate courts do not have the power to review lower court decisions unless a party appeals it.
ɪn ɐn ˌædvɚsˈɛɹɪəl sˈɪstəm, ɐpˈɛlət kˈoːɹts duːnˌɑːt hæv ðə pˈaʊɚ tə ɹᵻvjˈuː lˈoʊɚ kˈoːɹt dᵻsˈɪʒənz ʌnlˈɛs ɐ pˈɑːɹɾi ɐpˈiːlz ɪt.