Lost Toy (again)

Nala lost her Toy in the fog (again). Can you help her find it?

Normal Sudoku rules apply. Arrow: Digits along an arrow must sum to digit in the circle. Elements of the same color are connected. Fog of war: The grid is partially covered in fog. Placing correct digits will clear the fog from surrounding cells, possibly revealing more clues.

Nala will be thrilled about your help!