If the UK were to punish China over its treatment of Uyghur Muslims, they’d have to contend with

1. Most of China’s policies regarding Muslims in the region are in practice more permissive than the UK’s, which would open the UK up to legal cases against its treatment of refugees, immigrants, and Muslims in general.

2. There is blatantly more evidence of a genocide going on with active UK participation through daily RAF flights over Lebanon and Gaza, which would open them up to domestic rulings against weapons transfers to Israel.