The Uighur population of Xinjiang has grown rapidly over the past 5 years (something that you've said proves there was no genocide in Iraq), and what you're reading about in the news is the draconian enforcement of the same family planning policies on Uighurs as have up to recently only applied to Han people. Ethnic minorities used to be exempt from the one-child rule. Now, rules have been relaxed to 2-3 children, but they're being applied to minorities as well. You can denounce this policy without comparing it to the Holocaust, Rwanda, and other actual genocides.
So sure the Iraq war combined combined with a sectarian civil war, and after effects from the breakdown of the economy and social order possibly reached a few hundred thousand deaths. But that’s by definition not a genocide. If you want an American genocide look back to what happened to Native Americans.
Meanwhile “it encourages some of the country’s Han majority to have more children.” https://www.hindustantimes.com/world-news/china-cuts-uighur-...
“They gave Omirzakh, the penniless wife of a detained vegetable trader, three days to pay a $2,685 fine for having more than two children.
If she didn’t, they warned, she would join her husband and a million other ethnic minorities locked up in internment camps — often for having too many children.“
Of note a significant number of couples must have 3 children to maintain the population as some children die or never have children of their own. But, again that’s just one policy they are doing many other things which all add up.