In أَوَأَنْتَ حَاضِرٌ؟ the hamza is interrogative and the wāw is a conjunction; they are not one inseparable particle.
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Hamza before Wāw
The Two Interrogative Particles: Hamza and Hal
In أَوَأَنْتَ حَاضِرٌ؟ the hamza is interrogative and the wāw is a conjunction; they are not one inseparable particle.