This is the usual interpretation given to τοῦτο ὁ παραδούς μέ σοι
It couldn't be Caiaphas because Jesus speaks to him; if Jesus meant Caiaphas, He more likely would have used second person, 'you' directly addressing Caiaphas. But Jesus refers to "that one", another person than you, Caiaphas.
It couldn't be Judas because Judas was not the one with authority or power to "deliver" Jesus; he "betrayed" him for money with which he was like a slave, bought to do by the priests.
It cannot be the priests; they were many - not "The One" - and several times pleaded their lack of power or right to judge Jesus.
I believe Jesus meant his heavenly Father, God "above", "from the beginning", who by his Almighty Sovereignty according to the Eternal Council of his Grace predetermined every deed and decision in That Night and Day.
Jesus rebuked Pilate for his arrogance, 'Don't you realise (sarcastically) o king of the Jews, I, the mighty governor of the Roman province of Judea, Pilate, can do with you just what may please me?'
But Jesus the Only Potentate, standing before and speaking with Pilate the ruler on earth, tells Him that he had no power but that given him by his Father, God "above", "given" Pilate "BY THE ONE..." who here and now and with and "by" ['dia'] his Almighty Power, "delivers Me to you".
Then from Jesus the most unsettling words to Pilate because the One he resisted was Jesus' Heavenly Father, '...greater therefore is your sin!'
Pilate understood. Realising his own sinfulness against the holiness of Jesus the Son of the Almighty God above with whom he was confronted, his assertiveness evaporated, and very scared he anxiously "thenceforth sought to release him".
The difference is who "delivers" Jesus to Pilate, not Judas or anyone else; it is Jesus' Father, "The One ... above" with the "Power to", who delivered Him to Pilate.
Jesus would lay down his life with the Power He received from his Father to lay it down with, the same Power Jesus received from his Father to take his Life up again with.