Both Samsung and the rumor mill seem to be working hard these days on populating the 2019 Galaxy A series with new generations. The latest of these is reportedly the A21. According to new Geekbench listings, it will be powered by a MediaTek SoC and 3GB of RAM.
https://www.notebookcheck.net/The-Samsung-Galaxy-A21-may-be-on-the-way-according-to-a-new-leak.457420.0.html