That’s the gospel of Judas, and it’s considered part of Gnostic doctrine, which is basically the one thing all Christians agree on, in that they all agree it is absolute heresy.
Like basically considered pagan in terms of how “Christian” it’s seen as.
I actually have an idea for an althist based on if the core gospels were instead replaced with the Gospels of Thomas, Mary, Phillip, and Judas, leading to Christianity developing as a wildly more mystical sort of religion, and possibly even less tolerant of old faiths since Gnostic doctrines, of which all four of those gospels are apparently heavily steeped in, believes everything material and old testament related is literally made by satan, would need to actually research that one lol.