After a few luxury handsets available exclusively for the Chinese market, such as the W2018, W2019, and the W20, Samsung is back with the W21 5G. With a 7.6-inch Dynamic AMOLED screen inside and an external 6.23-inch display, the Samsung W21 5G looks like the Galaxy Z Fold2 5G and runs on the same Qualcomm Snapdragon 865+ processor.
https://www.notebookcheck.net/Foldable-Samsung-W21-5G-to-launch-later-this-month-exclusively-in-China.502264.0.html
Treating it as a limited edition of an existing model I guess a production run of a few tens of thousand units makes sense, before folding screens this line was completely unique models, that's what was weird...unless those were significantly cheaper to design and produce than it seemed.