וַֽיְהִ֥י הָֽאָדָ֖ם לְנֶ֥פֶשׁ חַיָּֽה (from Gen. 2:7, MT)
The new state of "giving spiritual life" was a matter of becoming through Christ's sacrificial death and his resurrection, not a matter of him being created. It refers to Christ's resurrected body. Paul was not just arguing for the resurrection. He was also arguing for Christ's resurrection.