I first heard about this on JRE and subsequent articles based on JRE.
However, China did pass "Recommendation Algorithm Regulations"[0]. Not sure if enforced.
ByteDance does operate a separate Chinese app specifically for kids[1], which is enforcing the recent anti-gaming regulation (no nighttime access, 40 minutes per day only).
The app also enforces that all kids use their real name, and they stated the following about content[2]:
In the youth mode, we have also prepared wonderful content for you, such as novel and interesting science experiments, exhibitions in museums and galleries, beautiful scenery all over the country, historical knowledge explanations, etc. I hope these contents can arouse children's interest in a certain field, and they will learn and gain something while watching the video.
