https://wccftech.com/these-are-the-samsung-galaxy-devices-getting-3-generations-of-android-updates/

When Samsung introduced the Galaxy Note 20 series at the Galaxy Unpacked, one of the surprising and perhaps the best announcements for any Galaxy user was that Samsung announced that the future Galaxy devices will be getting 3 generations of Android updates. This does not mean 3-year support, but your phones will run three different Android versions as they go ahead in time.

However, at the time of the announcement, things were not as clear as Samsung only mentioned the devices it had released at the event. Well, that changes today as the company has shared a list of devices that will be receiving 3 generations of Android updates.