I filled and sent a Ship but I only see a timer no rewards

After fully filling all four boxes of a ship row and sending them off, a timer will start. To receive the rewards for that ship row, you need to wait for the ship to return (the timer to complete). The first ship returns in 12 hours, the second ship in 18 hours, and the final ship returns in 24 hours with their rewards.

After the timer finishes your Ship of Wonders will come back with the rewards: