No one can read the book of John without clearly seeing that Jesus, and this whole book, clearly declare his being the “only begotten” Son of God, and His unique relationship with his Heavenly Father is a major topic of Jesus own words in this book.
Clearly stated throughout the NT, but especially in the gospel of John.
Exactly - read through John in GNT this summer - no one can read John without being convinced that John believed that Jesus was the only begotten Son of God who invaded time and space to redeem humanity