Well, they're totally different platforms . The rationale behind the TikTok ban (and I'm not saying I'm in favor of it or opposed to it) is that they can do spooky spooky things with your personal data and your attention – your opinions can be nudged once there's enough data on you and your eyeballs are on the app half the day. And just to repeat, I'm not saying I agree with the ban (well, not with banning just TikTok anyhow…)
Temu and AliExpress have their own problems (like the absolutely mind boggling waste of finite resources) but nobody's worried Temu is radicalizing boys or collecting tons of your personal data. And yes even Temu does collect data just like everyone else nowadays, but it's a shopping site; compared to a social network there's not all that much you can get out of your users or too many ways to really influence them outside of making them spend more money
Oh yeah it absolutely is bullshit, I'm not saying that. Or, well, it is true they're likely collecting tons of data but it's not like US companies don't do it too and for reasons that are probably just as bad. This is why I tend to think that if you're going to ban TikTok for collecting data, you can't ignore Meta, Amazon, Alphabet, Apple et al