The Bible gives a description of the resurrected body, the body of those in heaven.
1 Corinthians 15:42 “So also is the resurrection of the dead. It is sown a perishable body, it is raised an imperishable body:”
1 Corinthians 15:45-49 “So also it is written, ‘The first man, Adam, became a living soul.’ The last Adam became a life-giving spirit. However, the spiritual is not first, but the natural; then the spiritual. The first man is from the earth, earthy; the second man is from heaven. As is the earthy, so also are those who are earthy; and as is the heavenly, so also are those who are heavenly. Just as we have borne the image of the earthy, we will also bear the image of the heavenly.”
So, in heaven, we will have an imperishable, spirit body. Imperishable things are immaterial, for all material things can be degraded and thus can perish.
God is said to be immaterial, for He is said to be a spirit (John 4:24): “God is spirit, and those who worship Him must worship in spirit and truth.”
The Bible also says we are made in God’s image: Genesis 1:26 “Then God said, ‘Let us make mankind in our image, in our likeness.’”
Genesis 1:27 “So God created mankind in his own image, in the image of God he created them;”
It would seem, then, that according to the Bible, in heaven we will be immaterial. As well, we will be a spirit. We would consequently be truly made in His image, as the Bible says.
But if that is the case, how can something that is immaterial have a body, as 1 Corinthians 15:42 claims? An immaterial body literally would seem to be an oxymoron.
However, maybe the “body” label is metaphorical, not literal, in which case in heaven we could be said to be immaterial, to be a spirit, and to have a body.