How do Trinitarians reconcile the co-eternity of the Father and Son with John 3:16?

In Trinitarian theology, the Father, Son, and Holy Spirit are considered co-eternal, meaning none was created or came into existence at a different time. However, in John 3:16, Jesus is described as **“the only begotten Son,”** which seems to imply that He had a beginning. How do Trinitarians reconcile this idea of Jesus being begotten with the belief that He is co-eternal with the Father? I’m looking for theological explanations or interpretations that address this apparent tension in Scripture.