It's like suggesting BYD has a high likelihood of making their cars into weapons or something. It's not in the company or their countries interest to do that.
Sure it could happen but I bet it would only happen in a targeted way. Why risk all credibility right now and engage in cyber warfare?
BYD and Tesla have the same ability to brick their cars anywhere. It's less a "weapon" and more a way to cripple a subset of people overnight if they so choose. A general major downside of "connected" products.
Meaning Tiktok in the us is complete garbage for kids, almost like a virus. Whereas in China it's more educational.
If I had to place a hidden target it'd probably be around RNGs or publicly exposed services..