Samsung is known to release Android 10 on two smartphones this month, the Galaxy M40 and Galaxy A70s. Now there are three additional smartphones that appear; Galaxy A6 (2018), Galaxy A7 (2018), Galaxy A80.
Quoted from GSM Arena, an update for Galaxy A7 (2018) with version number A750FXXU4CTBC with a size of 1.3 GB. Not only that, there is also a new Dark Mode navigation gesture embedded in One UI 2.0 based on Android 10.
With this update, the security of Android phones will be further increased. While on the Galaxy A6, it gets Android 10 with build number A600FNXXU5CTB9 and also March 2020 Android Security Patch. But this particular smartphone, the details are not known for sure.
Speaking of the Galaxy A80, this smartphone will bring the latest version of Android with One UI 2.0 which is accompanied by Dark Mode and a new navigation gesture. But it doesn’t include the screen recording feature that is part of One UI 2.0 and is used by many high-end Samsung phones.
However, the Android 10 update for Galaxy A7 (2018) is known to have just rolled out in India, while the Galaxy A6 update (2018) and Galaxy A80 landed in France.
You can wait and monitor the update notifications in a few days. Can also be checked via Settings > Software update.