You can store nukes in your silo. The count appears on top of the silo and only you can see it. You can click on the silo you want to store the nuke in and the shop icon to purchase a nuke, as if you can purchase a boat only on sea.
Now, you can easily know how much nukes the enemy can launch via the gold info. After this update, you can't. This will make the endgame more unpredictable and strategic. You can fake threaten nations to nuke them or pretend like you dont have enough gold to buy nukes and then devastate them with a bunch of hydro bombs.