The Galaxy Z Fold2 remains available in the US, contrary to reports. Samsung has not stopped selling it on its US website. However, no US carriers have stock of Samsung's foldable smartphone in either colour, possibly in anticipation of the Galaxy Z Fold 3. Currently, the only way to get your hands on a Galaxy Z Fold2 in the US is to purchase an unlocked handset.
https://www.notebookcheck.net/Samsung-has-not-stopped-selling-the-Galaxy-Z-Fold2-in-the-US-but-carriers-have.546081.0.html