All angels, archangels, cherubim and seraphim are CREATED beings
That is an assumption not supported by the definition of the words (mal'ak, aggelos, angel), neither by the text of scripture itself.
Malachi 3:1 HOT - הנני שלח מלאכי ופנה דרך לפני ופתאם יבוא אל היכלו האדון אשר אתם מבקשים ומלאך הברית אשר אתם חפצים הנה בא אמר יהוה צבאות׃
Malachi 3:1 HOT transliterated - 3:1 hin'niy sholëªch mal'äkhiy ûfiNäh-derekh' l'fänäy ûfit'om yävô el-hëykhälô häädôn ásher-aTem m'vaq'shiym ûmal'akh' haB'riyt ásher-aTem cháfëtziym hiNëh-vä ämar y'hwäh tz'väôt
Malachi 3:1 so called lxx - ἰδοὺ ἐγὼ ἐξαποστέλλω τὸν ἄγγελόν μου καὶ ἐπιβλέψεται ὁδὸν πρὸ προσώπου μου καὶ ἐξαίφνης ἥξει εἰς τὸν ναὸν ἑαυτοῦ κύριος ὃν ὑμεῗς ζητεῗτε καὶ ὁ ἄγγελος τῆς διαθήκης ὃν ὑμεῗς θέλετε ἰδοὺ ἔρχεται λέγει κύριος παντοκράτωρ
The Son of God is directly called "the angel of the covenant" (ûmal'akh' haB'riyt ; ὁ ἄγγελος τῆς διαθήκης). He is uncreated and eternal.
The words mal'ak or aggelos or even angel, simply means "messenger, ambassador, that which carries a message". Created or Uncreated have nothing to do with the meaning of the words.
All 4 Gospels cite Malachi.