Where the referent is already fully recognizable, apposition may serve an additional function such as praise or honor. Thus clarification is the characteristic purpose, but not necessarily the only rhetorical effect.
جَعَلَ اللَّهُ الْكَعْبَةَ الْبَيْتَ الْحَرَامَ قِيَامًا لِلنَّاسِ
God made the Kaʿbah, the Sacred House, a support for people.
«The Sacred House» identifies the Kaʿbah while foregrounding its sanctity and rank. For a hearer who already recognizes the Kaʿbah, honoring it is more salient than supplying a missing identity.