Of course he is created. Read the biblical evidence in the Op.
Ezekiel 28:12-19:
“Son of man, take up a lamentation upon the king of Tyrus, and say unto him, Thus saith the Lord GOD; Thou sealest up the sum, full of wisdom, and perfect in beauty. Thou hast been in Eden the garden of God; every precious stone was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created. Thou art the anointed cherub that covereth; and I have set thee so: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire. Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee. By the multitude of thy merchandise they have filled the midst of thee with violence, and thou hast sinned: therefore I will cast thee as profane out of the mountain of God: and I will destroy thee, O covering cherub, from the midst of the stones of fire. Thine heart was lifted up because of thy beauty, thou hast corrupted thy wisdom by reason of thy brightness: I will cast thee to the ground, I will lay thee before kings, that they may behold thee. Thou hast defiled thy sanctuaries by the multitude of thine iniquities, by the iniquity of thy traffick; therefore will I bring forth a fire from the midst of thee, it shall devour thee, and I will bring thee to ashes upon the earth in the sight of all them that behold thee. All they that know thee among the people shall be astonished at thee: thou shalt be a terror, and never shalt thou be any more.”
Cherubims are angels, not humans. Here is an angel that is going to be destroyed. This is describing Satan.
Exo 37:9 And the cherubims spread out their wings on high, and covered with their wings over the mercy seat, with their faces one to another; even to the mercy seatward were the faces of the cherubims.
Revelation 12:1-4 shows Satan and his devils being eternally evicted from heaven. Interestingly the demonic angels are depicted as “stars.” It reads:
“And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars: And she being with child cried, travailing in birth, and pained to be delivered. And there appeared another wonder in heaven; and behold a great red dragon ... And his tail drew the third part of the stars of heaven, and did cast them to the earth.”
In Revelation 12:4, 1/3 of the angels sided with Satan in his rebellion. They sided with him when he fell, and are part of the kingdom of darkness.
Job 38:6-7 tells us, speaking about the beginning of time,
“Whereupon are the foundations thereof fastened? or who laid the corner stone thereof; When the morning stars sang together, and all the sons of God shouted for joy?”
Revelation 9:1 says:
“I saw a star fall from heaven unto the earth: and to him was given the key of the abyss.”
It seems correct to view the flying star in view here as an elect angel. Remember, the key or authority no longer belongs to Satan. He was defeated. Christ and His angels exercise that now within the invisible realm. We exercise it upon the earth.
It is clear that stars are used by John in Revelation as symbols of angels. A falling star is a common easily-recognized natural symbol that is used in a spiritual way here to describe an elect angel descending from heaven before the end of time to open the pit to release Satan and his demons from their restraint in order to restrict the great commission.
