Members of the Arab League are well known for their boycott of Israel over their treatment of the Palestinians. They likewise frequently issue official statements whenever Muslims are mistreated in Western countries and actively support Islamic institutions in the West.
But did any Muslim majority states issue an official proclamation in regards to the mistreatment of Muslims in China? What is the official position of countries such as Saudi Arabia on the position of Uyghurs and other Muslim minorities in Chinese society? At the very least the Xinjiang reeducation camps sound like something that should be strongly condemned by the Islamic community.