Besides wisdom, what did God give Solomon that he had not asked for?

Answer: Riches and honor

God gave Solomon what he did not request, riches and honor, so that no king would be his equal in his lifetime.

“Moreover, I will give you what you did not request—both riches and honor—so that during all your days no man in any kingdom will be your equal.”— 1 Kings 3:13 (BSB)