Solomon ruled at the one moment Israel was a wealthy international power. First Kings 10 describes gold arriving by the ton, ships trading as far as Ophir, ivory and apes and peacocks, and a queen from Sheba who traveled a thousand miles just to test his wisdom. First Kings 4:32 says he spoke three thousand proverbs and wrote a thousand and five songs. Proverbs is a selection from a much larger body of work.
Every great kingdom of that world ran schools for scribes. Egypt had a long shelf of "instruction" books in which a father or an official trained his son for public life. The best known is the Egyptian Instruction of Amenemope, and its advice overlaps strikingly with Proverbs 22:17–24:22 — do not rob the poor, do not move a boundary stone, do not make friends with a hot-tempered man. Wise observation about how life works was shared across the ancient world.
What made Israel's version different was its foundation. Proverbs takes that shared common sense and rebuilds it on one starting point: "The fear of the LORD is the beginning of knowledge" (1:7). Truth spotted by an Egyptian scribe is still truth, but here it is gathered under the covenant God of Israel rather than a crowd of gods.
Two centuries after Solomon, King Hezekiah's men went back into the royal archives and copied out more of his proverbs (25:1). Hezekiah was the reforming king who cleaned out idol worship and reopened the temple, and this scribal project belongs to that revival. The last chapter, the acrostic poem about the woman of valor, runs from the first Hebrew letter to the last — wisdom shown as a whole life rather than a lecture.