Despite U.S. officials’ calls for more supply-chain scrutiny over big fast-fashion and e-commerce brands like Shein and Temu, consumers across the nation haven’t exactly reined back their use of the sites. Temu’s mobile application amassed 10 million downloads in April alone, according to data from analytics firm Sensor Tower, and has consistently topped Apple and Google’s app store charts in the last few months. One link in the chain that has escaped much attention so far is the pack