Hebrews 1:10 refers back to the God who anointed His Son in Hebrews 1:9. Notice how verse 10 begins with "and" as that is key.
This is apparent in the context since in Hebrews 1:5 there is a day in which YHWH became the Sons Father. That means Jesus isn't YHWH and isn't the Creator.
Jesus the Son created all things in heaven and earth.
Your denial of scripture is blatant.
Jesus Christ is
the Lord: YHWH the LORD God.
He is coming soon, with His saints from Heaven on the Day of The LORD.
And in that day His feet will stand on the Mount of Olives,
Which faces Jerusalem on the east.
And the Mount of Olives shall be split in two,
From east to west,
Making a very large valley;
Half of the mountain shall move toward the north
And half of it toward the south.
Then you shall flee through My mountain valley,
For the mountain valley shall reach to Azal.
Yes, you shall flee
As you fled from the earthquake
In the days of Uzziah king of Judah.
Thus the LORD my God will come,
And all the saints with You. Zechariah 14:4-5
- Thus the LORD my God will come, and all the saints with You.
Jesus will return soon on the Day of the LORD, which is the Day of Christ.
And it shall come to pass
That whoever calls on the name of the LORD (YHWH)
Shall be saved. Joel 2:32
What is the name of the LORD (YHWH) we call on to be saved?
that if you
confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation. For the Scripture says, “Whoever believes on Him will not be put to shame.” For there is no distinction between Jew and Greek, for the same Lord over all is rich to all who call upon Him. For “whoever calls on the name of the LORD shall be saved.” Romans 10:9-13
Jesus is the name of YHWH: the LORD God of the Old Testament.
And without controversy great is the mystery of godliness:
God was manifested in the flesh,
Justified in the Spirit,
Seen by angels,
Preached among the Gentiles,
Believed on in the world,
Received up in glory. 1 Timothy 3:16
Jesus as God, was manifested in the flesh.
In the beginning was the Word, and the Word was with God, and
the Word was God. John 1:1
And
the Word became flesh and dwelt among us, and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth. John 1:14