Earlier this year, Samsung promised to provide up to four years of security patch updates for over 100 of its devices. Now, it has extended this to five years of support for some devices on its Enterprise Edition program, including the Galaxy S20 and Galaxy Note 20 series.
https://www.notebookcheck.net/Samsung-promises-up-to-5-years-of-security-patch-updates-for-some-devices.548329.0.html