There is a checkbox at the bottom to show only censored tags, the default view shows you what's currently popular, the title is very misleading.
If you do turn on the censored view, large part of the top 10 censored tags are about Chinese people protesting a proposed law to allow permanent residences to foreigners (like a green card).
There is another tag in top 10 claiming coronavirus is not originated from Wuhan. It's actually very different from what you read from the popular media here, you would think the government would be pushing this narrative.
Of course, anything against the government would be censored as well.
Concrete example: all I see under the hashtag “facing an epidemic, the police don’t retreat” are copy-pasted official press releases and stuff https://weibo-uncensored.github.io/#/weibo-viewer/#疫情当前警察不退#...