Here is a video by Matt Brown analyzing RedNote.

Chinese RedNote App Exposes Sensitive User Data — (18 min, here is an alternative Invidious link)

TLDR: It’s sending most of the app data in cleartext HTTP instead of TLS, while some of the TLS are not done in a secure way. It is true that other social media apps send data back to the servers, but here it appears to be less safe, enabling attackers to do so in transit.