Are there many things in the synoptic Gospels that are not in John's Gospel?
Yes, many events in Matthew, Mark, and Luke—the synoptic Gospels—are absent from John. The synoptics emphasize Christ's humanity, while John emphasizes His deity. For example, the temptations and the agony in the Garden of Gethsemane are recorded in the synoptics but not in John.
Les teaches that Matthew, Mark, and Luke are called the synoptic Gospels and deal primarily with His humanity, while John's Gospel deals with His deity. Because of this, a lot of things covered in the synoptic Gospels are not mentioned in John. For example, the temptations are recorded in Matthew, Mark, and Luke, but they are not recorded in John. Likewise, His agony in the Garden of Gethsemane, including the agony of it, is recorded in all three synoptic Gospels, but it is not recorded in John's Gospel, because that was part of His humanity and suffering.
More Questions
Why does John's Gospel not include many events found in the synoptic Gospels?
A lot of things covered in the synoptic Gospels are not mentioned in John because the synoptics emphasize Jesus' humanity while John emphasizes His deity.