Since YHWH and the Bible acknowledge other gods, does that mean that they literally exist?

The other gods ("elohim") are us according to Psalm 82:6.

"I said, “You are gods ("elohim"), sons of the Most High ("El"), all of you; nevertheless, like men you shall die, and fall like any prince.” (Psalm 82:6).

It should be noted that the tanakh distinguishes between Elohim and El, whom the earliest Christians called, Christ and True God, respectively. YHWH was one among the elohim ('gods'), for example, "For who in the skies compares to YHWH, who can be likened to Yahweh among the sons of God ("Elim") (Psalm 89:6).

Paul reveals elohim to be Christ (1), among other places. Jesus, Paul, and the first Christians (gnostics) knew the "true God and Father", that is, a supreme God over the Elohim, to include over YHWH, Jesus, and us, the "gods" or "elohim". Paul even teaches in multiple places that we are members of Christ's one body or, in other words, members of Elohim ("gods").

The first Christians from the first through third centuries were mostly gnostics who believed that the true God and Father (John 17:3, 1 Corinthians 8:6) is unknown to the many and whom the prophets, Jesus, and Paul taught to be the true God of gods (El of elohim) To the gnostics Elohim was a so-called God mistaken by both Jews and the protoorthodox (later called Catholicism and subsequently Protestants) to be “God” whereas, elohim was actually the only begotten Son, through whom our world exists. Paul writes about this in his letters but people ignore what he writes because it does not fit with their doctrines (e.g. Trinity).

You don’t hear much about this because by the fourth century Catholicism led by a Roman Emperor, persecuted gnostics and destroyed their writings and confiscated their churches. Catholic fathers (Iranaeus, Hyppolytus, etc.) who came earlier twisted the teachings of the gnostics and labeled them as false teachers thereby indoctrinating future generations against their beliefs. Fortunately, the gnostic writings were discovered and scholars are beginning to understand their beliefs (2.,3.), to include the belief in a supreme God (true God and Father) above YHWH Elohim/Christ.

References.

1. 2 Corinthians 4:6. “For God [Elohim], who said, “Let light shine out of darkness,” (Genesis 1:3) has shone in our hearts to give the light of the knowledge (gnosis) of the glory of God in the face of Jesus Christ.” Simply, Elohim is revealed to be Christ.

2.“Iranaeus’ contradictory presentation of the Valentianians as having both a common (false) doctrine and as constantly disagreeing among themselves is not due to the nature of Iranaeus’ evidence, but to this polemical construction of his enemies….Thus, the whole idea of Valentinian regular is a construction made by Iranaeus to serve his own polemical purpose.” (The Spiritual Seed, The Church of the Valentinians, Einar Thomassen, pp. 16)

3.“It will thus be seen that the study of Gnosticism from direct sources is quite recent, and that all but the most recent research is out of date. This new view is all the more forced upon us by the latest discovery which in the Akhmim MS. Places in our hands the means of testing the accuracy of Irenaus, the sheet-anchor of heresiologists. The Gospel of Mary is one of the the original sources that Iranaeus used. We are now enabled in one case to control the Church Fathers point by point—and find that he has so condensed and paraphrased his original that the consistent system of the school of Gnosticism which he is endeavoring to refute, appears as an incomprehensible jumble.” (Fragments of a Faith Forgotten, George Robert Stow Mead)

I have been reading the bible over again, from start to finish. What I have concluded is that men make of themselves gods, images to worship. The bible states in any translation that I have read this far, that Yahweh is the only power in the universe and that even when he made himself known to the holy men of old, they never saw his form or his face. Mankind is a seeing is believing sort of race and they created for themselves a god and new gods because they did not see Yahweh Deuteronomy 11:16-17, Deuteronomy 27:15 deuteronomy28:14 Judges 2:11, Ruth 1:15, I Samuel7:3, the list goes on and on. In doing this, they have given themselves up to the curses talked about by moses and they came to worship the creations rather than the creator. So far, I am in I Chronicles 5, and even there it talks about how the tribe of Reuben was given up Into captivity for the worshiped gods and of images I Chronicles 5:25. This is no different than the Jewish star, the cross, the golden calf, or a picture of jesus or a virgin Mary. These are all images made to be worshipped, rather than the true maker of the universe and all things in it, Yahweh.

The Bible as a whole is clear that there is only one God (YHWH) who created all things, and the "other gods" He warns about are things or spirits that people treat as if it were a god. There are certainly other spirits that communicate with people (which is why God said Not to seek them or listen to them nor let them speak) but only God (YHWH) is good (Jesus Christ said that). According to His word, He will definitely punish "the powers in the heavens" for allowing and encouraging people to believe they are God. (Isaiah 24:21; Mark 1:25; Leviticus 20:6)