Samsung recently announced that it would improve its long-term software support to three years for its flagship phones starting with the Galaxy S10 series. New information indicates such support may trickle down to the Galaxy A-series, however, with the Galaxy A71, A51, and A90 being the most likely to enjoy that perk.
https://www.notebookcheck.net/Samsung-Galaxy-A71-Galaxy-A90-Galaxy-A51-potentially-eligible-for-Android-13.485840.0.html