The scriptures give us only a taste of who Jesus was and what Jesus did. They tell us this explicitly (see John 21:25). There is more than we know. More than we can know.
Many have tried to fill in the gaps with wild tales, of an infant Jesus speaking from the crib, of a boy Jesus amazing adults by creating birds from clay, of an adolescent Jesus journeying to the far corners of the earth, of a risen Jesus teaching so much more than he though to impart before the crucifixion, and more.
But these are all exercises in missing the point. We don’t know everything. We don’t have to know everything. We do, however, know enough.