In Ezekiel 1 and 10, the divine throne moves on ophanim, wheels, each a wheel within a wheel, moving in any direction without turning, their rims full of eyes, and the spirit of the living creatures was in the wheels. Daniel 7:9 gives the Ancient of Days a throne of fiery flames, its wheels a burning fire. Nowhere does either prophet call the wheels angels; they are the chariot's running gear.
Later Jewish apocalyptic did the promotion: Enochic literature lists ophanim among the throne classes, Maimonides ranks them second of ten, and Christian tradition merged them with the Thrones of Colossians 1:16. The object's personality grew with each retelling, from running gear to sleepless guardians of the throne who never rest. Be not afraid, says the meme; the text says only: wheels, eyes, spirit.
The claim: ophanim are the residue of an older storm-god chariot theology, YHWH rides the cherub, the throne has wheels because gods arrive, and demoting them to furniture while promoting them to angels is one event, the same discomfort wearing two hats. Verdict: storm-chariot parallels, Baal's clouds, are solid comparative religion. The wheels' eyes are the anomaly no reading fully digests: furniture does not watch. Perhaps that is why they had to become angels.
When does a chariot part become a person?