In our Biblical Encyclopedia, under
Divine, it partially says about Col. 2:9 and other related texts:
(...) at Colossians 2:9 the apostle Paul says that in Christ “all the fullness of the divine quality [form of the·oʹtes] dwells bodily.” Here, again, some translations read “Godhead” or “deity,” which Trinitarians interpret to mean that God personally dwells in Christ. (KJ, NE, RS, NAB) However, Liddell and Scott’s Greek-English Lexicon defines the·oʹtes in basically the same way it does thei·oʹtes, as meaning “divinity, divine nature.” (P. 792) The Syriac Peshitta and the Latin Vulgate render this word as “divinity.” Thus, here too, there is a solid basis for rendering the·oʹtes as referring to quality, not personality.
A consideration of the context of Colossians 2:9 clearly shows that having “divinity,” or “divine nature,” does not make Christ the same as God the Almighty. In the preceding chapter, Paul says: “God saw good for all fullness to dwell in him.” (Col 1:19) Thus, all fullness dwells in Christ because it “pleased the Father” (KJ, Dy), because it was “by God’s own choice.” (NE) So the fullness of “divinity” that dwells in Christ is his as a result of a decision made by the Father. Further showing that having such “fullness” does not make Christ the same person as Almighty God is the fact that Paul later speaks of Christ as being “seated at the right hand of God.”—Col 3:1.
Considering the immediate context of Colossians 2:9, it is noted that in verse 8, Christians are warned against being misled by those who advocate philosophy and human tradition. They are also told that “carefully concealed in [Christ] are all the treasures of wisdom and of knowledge,” and they are urged to “go on walking in union with him, rooted and being built up in him and being stabilized in the faith.” (Col 2:3, 6, 7) In addition, verses 13 to 15 explain that they are made alive through faith, being released from the Law covenant. Paul’s argument, therefore, is that Christians do not need the Law (which was removed by means of Christ) or human philosophy and tradition. They have all they need, a precious “fullness,” in Christ.—Col 2:10-12.
Finally, at 2 Peter 1:3, 4 the apostle shows that by virtue of “the precious and very grand promises” extended to faithful anointed Christians, they “may become sharers in divine nature, having escaped from the corruption that is in the world through lust.” Elsewhere in the Scriptures, Christians are referred to as ‘sharing’ with Christ in his sufferings, in a death like his, and in a resurrection like his to immortality as spirit creatures, becoming joint heirs with him in the heavenly Kingdom. (1Co 15:50-54; Php 3:10, 11; 1Pe 5:1; 2Pe 1:2-4; Re 20:6) Thus it is evident that the sharing of Christians in “divine nature” is a sharing with Christ in his glory.
See here
https://wol.jw.org/en/wol/d/r1/lp-e/1200001201