Quite the dystopian scenario you've got there, but I'll play along.
Off the top of my head, perhaps a Dunhill British Leather.
How about you?
The year is 2077. Ten years ago there was nuclear war and most of the world is now in habitable. You're about to run out of your last deodorant. But that's ok, that's in the real world. Since you can't go outside anymore, you instead catch up with your friends on your Apple Vision Ultra Max. Which virtual smell are you choosing to wear? #AskNostr
https://www.macrumors.com/2024/01/29/apple-vision-pro-headset-sales/
Discussion
By that point, trees will no longer exist. So, I'd probably choose a Cedar + Sage type of smell.