alt Hacker NewsUN High Commissioner on Human Rights Michelle Bachelet actually visited Xinjiang and made no such assertions. Whoever did release the report you're referencing, they waited until immediately after her term ended to release it (within hours). Pretty conspicuous.
No it was actually released hours before her term ended not after. And the reason she held off releasing until the last minute is because of pressure from China to refrain from releasing it.
In addition to releasing the report she released a 131 page Chinese rebuttal simultaneously. Not the actions one would expect of a shadowy group at the UN out to get China.