In the Gospel of John “the beginning” refers to the beginning of the ministry of Jesus.

“in the beginning” ἐν ἀρχῇ : Needs context. Vast majority of ἐν ἀρχῇ references in the Bible are not related to Genesis.

Agreement with other Gospels “beginning” which relate to the ministry of Jesus.

Agreement with other New Testament literature that in Jesus there is a new beginning, a new creation.

The subject of what comes to be in John’s Gospel is not seas, dry land, plants, animals, planets, stars, sun, etc., but (new) human life. The word "world" in John 1:9-10 does not mean planet earth, but a segment of human society, indeed Israelite society. The subject and context is not the creation of the material "world".

Some similar language, but for a different purpose. Life, light and darkness in John are not Genesis light, life and darkness. Mistaking parallelism and continuity for identity.

Themes in the Prologue are associated with Jesus in the body of the Gospel.

Consolation prize: Commentators recognize John 1 introduces a new beginning.

John the Baptizer in verses 6-8 has no reason to be in an account of the Genesis creation.