The idea that Temu is gonna end is nonsense. First of all, the US is just one market for them. They're red hot in many countries in latin America, Asia, Africa and so many others. Moreover, I guess they'll eventually find other ways to sell products in the USA, in one way or another.
What's the difference between them and Wish.com then? Wish eventually failed, but Temu still seems to be trucking along.
Temu has direct access to producers of the items they sell. They know what categories are profitable, having incredible logistics directly tied to Chinese industry. Wish, from what I can getter, was just an American middle man.