Luke 24:39 "See My hands and My feet, that it is I Myself; touch Me and see, for a spirit does not have flesh and bones as you see that I have."
Jesus was resurrected as the first of the first-fruits. As He was resurrected in the flesh first before being transformed into Spirit, so shall we also be.
Revelation 11: The 2 Witnesses will be resurrected in the flesh first, before being transformed. Their resurrection and transformation is the same day and same time as ours, the exact same 1st Resurrection, therefore will be of the same manner.
1 Corinthians 15 A seed is physical and it’s fruit is also. What you plant is what you get. If you plant the human flesh, the human flesh will be what you get. Although it will be transformed. The transformation from flesh to spirit will occur in the twinkle of God’s eyes.
Philippians 3:20-21 Will transform our body.
John 5:28-29 "Do not marvel at this; for an hour is coming, in which all who are in the tombs will hear His voice, and will come forth.”
Cremation, Adam and Eve and before Noah:
If God could create flesh and bones for Adam and Eve, from the dust of the Earth, when Adam and Eve had not previously existed, then the same GOD can create us a new body from the dust of the Earth, even if we were cremated, or even if our bones had deteriorated from the passage of time for thousands of years.
https://www.isawthelightministries.com/bodilyresurrection.html