It is difficult to prove a negative, but from my experience the answer is 'basically no, unless you count output on this subreddit.' While academic consensus on the Opium War has swung decisively in the revisionist direction, most online articles continue to exaggerate the impact of the war and fail to cover the Chinese side in any significant depth. Going back to the paper medium, there are a couple of recent books intended for a wide audience – Julia Lovell's The Opium War and Stephen Platt's Imperial Twilight especially – which should be relatively accessible and not prohibitively expensive. If, however, you are insistent on the content being free and online, my answers on Opium War topics can be found here and my rebuttal to Extra Credits' Opium War video series here.