Anecdotal evidence. Maybe it's what you were recommended based on your watch history or other data points. YouTube recommends me anti-China content all the time.
YouTube has a lot of anti China and anti US content. But you can block channels and subjects and clean it up. But the difference is anti. US content tends to be fake propaganda. Like claiming covid started in the US and was designed to kill people in China? That’s blatant propaganda. That’s anti US. Talking about the US spending money on gain of function research in Wuhan? That’s just reporting on facts. But I don’t consider that anti US.
Anti China content is just facts. If a video comes out saying there’s protesting in China due to zero covid. That’s not fake news. It’s not propaganda. It’s just something happening and CCP bots will scream “anti China anti China”
You can’t do that on tiktok.
I specifically called out Facebook and Instagram. It’s not flooded to death with propaganda.