The migration of US TikTok users to Xiaohongshu this week, to the point where it is #1 on the US app store while still having half of its UI in Mandarin has been particularly eye opening.
This reaction is very rushed and I don't think it's going to be very lasting, I'd expect people to go to reels/shorts until maybe another (western, american probably but could be european) alternative appears.
These people are up for grabs, they're not going to stay in Xiaohongshu.
It's very hard to go back to an app with a poor FYP algorithm (ie. Reels, Shorts) after using an app with a good FYP algorithm, and this, along with a knee-jerk reaction against Meta for its perceived role in lobbying for the "TikTok ban" will make capturing ex-TikTok users an uphill struggle for Meta's products.