I've never used Temu and for all I know they're questionable, but this article is not itself very credible. It's heavy on uncited economic assertions, makes a hackneyed national security argument, and is actually very light on the technical security details. Plus it suggests nonsense like TikTok not requiring the android.permission.INTERNET
permission, lol.
On their "About" page they gladly announce that they're a private company hired by big corps and finance bros so on, and they have an unexplained focus on China. I suspect they take money to do hit jobs.
I'd be interested to see a security comparison between, say, Temu, Amazon, and Facebook apps.
It's a good one. You can stuff cash in an envelope to pay for it if you want.