Jesus affirms the godhood of his Father several times in the Holy Scriptures.
But every single time he proclaims his Father’s godhood he also simultaneously , by implication, proclaims his own godhood because he is making the Father known as God by expressing the fact of his filial relationship with him.
In John 17:1-3, Jesus repeatedly spoke of his filial relationship with the Father in mentioning the terms “Father” and “Son” in their respective tasks.
"Jesus spoke these words, lifted up His eyes to heaven, and said: “Father, the hour has come. Glorify Your Son, that Your Son also may glorify You, 2 as You have given Him authority over all flesh, that He should give eternal life to as many as You have given Him. 3 And this is eternal life, that they may know You, the only true God, and Jesus Christ whom You have sent."
In this texts, specially in verse 3, we read that Jesus calls his Father ” the only true God.”
Jesus is not excluding himself away from the godhood of the Father but rather, he is emphasizing it by affirming his Father’s true godhood.
What makes one a “true God”?
In the Old Testament, we found numerous references stating YHWH alone is the true God as opposed to those false gods worshiped by other nations and we know that this is true, having known his attributes displayed hand-in-hand with the affirmation of his being true God.
Jeremiah 10:10 — But the LORD is the true God, he is the living God, and an everlasting king: at his wrath the earth shall tremble, and the nations shall not be able to abide his indignation.
2 Chronicles 15:3 — Now for a long time Israel has been without the true God, and without a teaching priest, and without law.
Kings 5:15 — And he returned to the man of God, he and all his company, and came, and stood before him: and he said, Behold, now I know that there is no God in all the earth, but in Israel; now therefore, I pray thee, take a blessing of thy servant.
The same principle in teaching this ancient monotheism is readily seen in the New Testament in a much explicit way. In Galatians 4:8, it is said that Christians in Galatia were formerly slaves of false gods who are not really gods “by nature.” This is an important mark to determine the genuineness of one’s godhood and in the case of Jesus Christ, his godhood is attested not only by having the nature of God as the Scriptures show but also by revealing in what way is he God by nature and this is by being the Son of God.
John 10:28-30 — I GIVE THEM ETERNAL LIFE, and they shall never perish; no one will snatch them out of MY HAND. My Father, who has given them to me, is greater than all; no one can snatch them out of my FATHER’S HAND. I AND THE FATHER ARE ONE.”
Deuteronomy 32:39 — 'See now that I, I am He, And there is no god besides Me; It is I who put to death and GIVE LIFE. I have wounded and it is I who heal, And there is no one who can deliver from MY HAND.