This is an interesting revelation about Jesus. Jesus was a man - we know from other verses that he was not immortal before his resurrection.
We see from Stephens's dying words, he committed, entrusted, his spirit to Jesus (now ascended)
Jesus did exactly the same thing - entrusting his sprit also to a heavenly being, his Father. This speaks of Jesus mortality - and his expectation to be raised again.
Certainly, he could not raise himself anymore than Stephen could. The Father raised Jesus - as attested by over 30 verses to that effect. Jesus said he had authority (John 10:17-18) to live again - because he was without sin, thereby not being under the authority of sin and death. Rom 6:9 speaks of him having death as a master while he was still mortal - but not after his death!
Jesus was raised because death could not hold him - he was without sin; death has no power over him. He defeated death for all by his victory over evil, pride and idolatry.
2 Tim 1:9-10 ...God, who has saved us and called us with a holy
calling, not according to our works, but according to His own purpose
and grace which was granted us in Christ Jesus from all eternity, but
now has been revealed by the appearing of our Saviour Christ Jesus,
who abolished death and brought life and immortality to light through the gospel.
John 11:25,26 Jesus said unto her, I am the resurrection, and the
life: he that believeth in me, though he were dead, yet shall he
live.
Why did Jesus commit his spirit to the Father at death?
This passage corroborates that he was a mortal man just like us. Yes, he is the son of God, and the last Adam, but this speaks of the human Jesus, born ~4BC, received the holy spirit at his baptism and it remained on him from then.
But at his death, Jesus surrendered his spirit to the Father - not His so-called 'eternal self' or the HS. This speaks volumes about who Jesus was and is!
To who else could it go, but back to the Father who gave it. Jesus was dead in the earth until the Father raised him to new life - as the firstborn of many brethren Rom 8:29
Rom 6:4- ...as Christ was raised from the dead through the glory of
the Father, so we too might walk in newness of life. For if we have
become united with Him in the likeness of His death, certainly we
shall also be in the likeness of His resurrection.
Jesus was a man like us - only without sin, dependent on the Father for everything including life.