No, we don't. The vast majority of primary "evidence" comes out of the ETIM lobby (WUC, Adrian Zenz, et al.) and war lobby (ASPI, etc). All of it massively signal-boosted by the mainstream corporate media. Both sources have a very, very clear (conflict of) interest in manufacturing anti-China sentiment.
Grainy satellite imagery of ordinary schools and prisons is only admissible as "concentration camps" if you're a shameless propagandist.
It's quite literally the same playbook as "Saddam's WMDs", with similarly cynical goals. Because it worked. And it's been similarly effective at duping the average media consumer.