The 𝐬𝐨𝐧 of God is mentioned in the OT.

Proverbs 30:4 NASB
Who has ascended into heaven and descended? Who has gathered the wind in His fists? Who has wrapped the waters in His garment? Who has established all the ends of the earth? What is His name or 𝗛𝗶𝘀 𝗦𝗼𝗻's name? Surely you know!

Isaiah 7:14 NASB
Therefore the Lord Himself will give you a sign: Behold, the virgin will conceive and give birth to a 𝐬𝐨𝐧, and she will name Him Immanuel.

Isaiah 9:6-7 NASB
For a Child will be born to us, a 𝐬𝐨𝐧 will be given to us; And the government will rest on His shoulders; And His name will be called Wonderful Counselor, Mighty God, Eternal Father, Prince of Peace. [7] There will be no end to the increase of His government or of peace On the throne of David and over his kingdom, To establish it and to uphold it with justice and righteousness From then on and forevermore. The zeal of the Lord of armies will accomplish this.

Daniel 3:24-25 NASB
Then Nebuchadnezzar the king was astounded and stood up quickly; he said to his counselors, “Was it not three men that we threw bound into the middle of the fire?” They replied to the king, “Absolutely, O king.” [25] He responded, “Look! I see four men untied and walking about in the middle of the fire unharmed, and the appearance of the fourth is like a 𝐬𝐨𝐧 of the gods!”

Hosea 11:1 NASB
When Israel was a youth I loved him, And out of Egypt I called My 𝐬𝐨𝐧.

The entire point of the Bible is all about Jesus. If you've made it about something else, you've missed the point.