This has actually gained mass coverage recently given the current geopolitical atmosphere. However, I would take this with a grain of salt. If you do a bit of research, you will find the claim was made by people related to the East Turkestan Islamic Movement[1](a terrorist organization linked to Al-Qaeda) and the World Uyghur Congress.
[1]https://en.wikipedia.org/wiki/Turkistan_Islamic_Party [2]https://en.wikipedia.org/wiki/World_Uyghur_Congress