And who has denied that?
The fact is that God has made a progressive revelation of Himself through the Old and New Testament, as stated by your Orthodox Catechism I cited.
It is clear that your own Catechism rejected the LXX for the Hebrew of the Jews No Orthodox so-called 'catechism' rejects LXX in favor of the Chrit-denying Hebrew OT. The entire EOC community recognizes LXX as the OT 7#151; officially.
Well according the Catechism that I cited, they at least rejected the Apocrypha books because they were not in Hebrew.
So clearly, that Catechism placed a greater emphasis on the Hebrew than the Greek.
FTD, God established the New Covenant for all the reasons given in Heb 8. People have ever-so-slowly accepted, with much doubt and wondering, what God was revealing to us, even to this day, going back-and-forth. But the Faith God delivered once has not changed. People's perceptions have.
Well according the Catechism that I cited, they at least rejected the Apocrypha books because they were not in Hebrew
It's not an official Orthodox Catechism. There is no such an entity. Maybe the Tsarist Russia issued something "official," but it certainly is no more Orthodox than a 17th century Calvinist Ecumenical Patriarch was. It's an aberration if it truly says what you claim it says. No Orthodox Church Rejects Apocrypha because it is part of the Orthodox Scriptures, even less so because they are not in Hebrew.