Yesterday Samsung rolled out the October 2021 Android security patch for the Galaxy Z Fold3, which is now rolling for the Galaxy Z Fold2 with a new software update.
A detailed changelog of the update is currently unavailable, but we know it has firmware version F916NKSU1DUI4 and is expected to bring some improvements to the Galaxy Z Fold2 in addition to the latest security patch.
The new update is currently seeding in South Korea across different carriers, including SK Telecom, KT Corporation, and LG U+. You can head over to your Galaxy Z Fold2's Settings > Software update menu to check for it manually if you haven't received an update notification yet.
Fold 2 the best
Have the Galaxy Z Fold 3 (India), got the September security update on September 30. Hope we get the October security patch in October itself, lol.