Lets first see what the UN defines as genocide
- Killing members of the group
- Causing serious bodily or mental harm to members of the group
- Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part
- Imposing measures intended to prevent births within the group
- Forcibly transferring children of the group to another group
So the first criteria are definitely met, no need to discuss it at all.
Serious bodily harm, there is no need to discuss this either, because serious bodily harm can be anything from torture to sexual abuse which basically happens almost everywhere.
Now the interesting part,
- Imposing measures intended to prevent births within the group
Pregnant Uighur women are forced to do an abortion,
They insert IUDs to prevent them from getting pregnant,
They force them to take experimental drugs to make them sterile.
In many cases single young Uighur women are forced to live with and marry Han Chinese.
- Forcibly transferring children of the group to another group
CCP have built thousands of "re education" kindergartens/schools. They take young children away from their Uighur parents, they send them to these "re education" kindergartens/schools, where they brainwash them from young age to forget their religion, culture, language etc. They learn to embrace Chinese and communism, then they are sent to orphanages.
Edit: I forgot this one:
- Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part
According to official statistics, just from 2015-2018. The Uighur population in Xinjiang declined by 84%, while the Han Chinese population in the same area grew by over 100%. There are numerous proofs from satellite photos that they are destroying Uighur cultural sites and mosques.