Temu is an online marketplace, rather than an actual seller of products. (i.e. lots of different sellers use Temu as a place to advertise and sell their products). So there will almost certainly be a mix of honest and dishonest sellers on Temu. I certainly wouldn't use the site to purchase any high value products but, if you're prepared to take a bit of a chance, there are definitely some bargains to be found. See here:
https://www.theanswerbank.co.uk/ChatterBank/Question1841417.html
I watched a YouTube video recently from an American guy who's got an excellent track record of posting hundreds of technology videos. (i.e. he's not a scammer who just put a video up to promote a dodgy deal). He saw an offer for a handheld UHF/VHF transceiver on Temu, of the type (and make) that are popular with amateur radio enthusiasts. (I've got one myself. They generally retail for between £40 and £50 in the UK, although I picked mine up for £30). The price quoted on Temu was just $2.99 + $0.25 tax (= $3.24), with free shipping. So, not really expecting to get what he ordered, he sent off for one. Amazingly (in my opinion anyway) he received the product that he'd ordered.