God is explicitly not the author of evil.

Evil is not a thing per se, not part of the creation that He saw and proclaimed to be “very good”.

Augustine and other church fathers explained evil as the privation or absence of good, that evil has no being — similar to how darkness is the absence of light.

If you imagine evil has a substance or being you end up in gnostic heresies.

What we call evil has no power or being, hence it cannot create but only corrupt or destroy that which is good.

This is also why God is 100% responsible for all that is good, including our redemption. And that man is 100% responsible for sin and the evil of turning away from God.

This is true in reformed and orthodox theology.

The goodness of God is such that He can bring good out of evil, but this is like a light shining in the dark, not to be confused with God authoring evil, only fallen man is responsible for evil.