Probably no. Burnt rice will smell burnt and turn black and impact a lot of the rice.
I've burn rice, and it ends by discarding everything.
On the other hand,
There is a brief moment between cooked rice and burnt rice when the rice on the bottom of the pan is just getting crispy, like the Paella's socarrat.
It can absorb spices.
I have a Sicilian couscous recipe which involves boiling large couscous in water with a couple of cinnamon sticks. The couscous tastes mildly of cinnamon when it's done, which is part of the balanced spicing of the recipe. The large couscous in this case is boiled for 7 minutes, and you put the cinnamon sticks in while the water is ...