Pre-exist? Foundation of the World - Part II

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Trinitarians use 1 Peter 1:20 to prove their belief that Yeshua exist before the creation of the world: “For he was foreknown before the foundation of the world, but has appeared in these last times for the sake of you”.

Also, John describes him as "the Lamb slain from the foundation of the world" (Rev. 13:8).
Can it be said that Yeshua "slain from the foundation of the world"? Yes, in the sense he was our Yom Kippur sacrifices but literally as Trinitarians like us to believe, no.

Note the story of Isaac, before his conception Isaac was no more than a thought of his father (and of G-d). He was the promised son! In a comparable way Yeshua was promised by the prophetic word. He is described as the Lamb foreknown, not as the Lamb pre-existing. This again is similar what 1 Pet. 1:20 is saying: “For he was foreknown before the foundation of the world, but has appeared in these last times for the sake of you”.

G-d projected that Yeshua would enter the world and die in place of mankind for their sins. He would be "the Lamb slain from the foundation of the world" (Revelation 13:8). This meant that Yeshua was prophesied to die at a particular time, in a certain spot, and by a select group of people, and it was all in the strategy devised by G-d from the beginning.