Samsung launched the Galaxy Quantum 2 in its native South Korea recently, and is thought to rebrand it as the Galaxy A82 5G for the rest of the world. Despite its status as a new launch, a blog has dug up evidence that it will get just 4 new security patches per year. This may have something to do with its Snapdragon 855+ SoC.
https://www.notebookcheck.net/The-Samsung-Galaxy-A82-5G-will-have-a-quarterly-security-patch-upgrade-schedule-on-its-launch.537761.0.html