Possible meanings are 1) "the work that God does under the sun" or 2) "the work that God allows people to do under the sun." (See: [[rc://en/ta/man/translate/figs-activepassive]])
This refers to things that are done on earth. See how you translated this in [Ecclesiastes 1:3](../01/03.md). Alternate translation: "on the earth" (See: [[rc://en/ta/man/translate/figs-idiom]])