dont imagine how i read 1 Cor 15:45 anymore .
45 And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit. you will notice Jesus wasn't refereed to last man Adam in that verse because its the Spirit
"This must refer to the resurrection of Jesus and the future resurrections through Him (cf. v. 57). It is not meant to deny a physical aspect to Jesus' post-resurrection appearances, but to contrast the first Adam, whose actions caused death, with the last Adam, whose actions caused life, eternal life, resurrection life! This is an example of the Adam-Christ typology (cf. Rom. 5:12-21; 1 Cor. 15:21-22,45-49; Phil. 2:6-8)."
Let's look at the whole context-
45 So it is written: “The first man Adam became a living being” ; the last Adam, a life-giving spirit.
46 The spiritual did not come first, but the natural, and after that the spiritual.
47 The first man was of the dust of the earth; the second man is of heaven.
48As was the earthly man, so are those who are of the earth; and as is the heavenly man, so also are those who are of heaven.
49 And just as we have borne the image of the earthly man, so shall we bear the image of the heavenly man.
The blue words refer to Adam. The red words refer to "the last Adam" or the "heavenly man".
I don't see how one can separate the "last Adam" from the "heavenly man".
Regarding the phrase "last Adam, a life-giving spirit", just consider what Jesus said in John 10:28- I give them eternal LIFE, and they shall never perish.
Jesus Himself gives eternal LIFE. So all the red words refer to Him. Jesus IS the last Adam.