no because someone could just check what the nation want and get info about that nation. Also there not a lot of acurate way of checking like if the leader trade just two random people on /ah

And for private trade it’s not even possible to see

I fail to see how not being able to see private trade and also seeing what a nation wants or sells are reasons to not implement a Trade command to see what individual nations are trading. i think a command such as "/toptraded bynation Buy/Sell NATION_NAME" would be a great command to see what a nation is buying and selling. Its great for nations on a planning perspective and its great for merchants to see what individual nations are buying and selling.