It's obvious that the US is trying to emphasize what's going on in Xinjiang for political benefit. That said, it's pretty clear it is happening. Its important to draw attention to how powerful institutions influence media narratives, but that doesn't mean that we should disregard anything these institutions push. Rather, the narratives they propagate should be given increased scrutiny. IMO, There's enough evidence from both biased and unbiased sources that there's a cultural, if not literal, genocide happening in Xinjiang.

If you want anecdata, I'm friends with a Han Chinese - who is overall pretty supportive of the CCP, mind - who was born and raised in Xinjiang. When they return to visit their family, they have relatively few restrictions compared to foreign journalists or tourists. They've told me that mass relocations - and deaths in the camps - are clearly happening, based on what they hear from local Uyghurs and from things they just see around their hometown.