I’d use actual physics to drive it. You can randomize the dices rotation at the moment of throw, and maybe apply a random linear impulse within a certain range, for the dices to move even more random.
Once they have stopped, you can check if Up/Forward/Right vector corresponds to the World Z vector and that’s how you get the number.
You’ll have to experiment with physics materials for the dices and the table, apply different friction values to see what works the best.
Can’t show any BPs at the moment.