Recently Samsung launched Beta version of Android Pie for Galaxy A7 2018 in India. Meanwhile different models of A series got the Beta version in different countries. A8 2018 & A6 2018 got beta version of One Ui in South Korea. As per the latest update of stable release in notice section, All A series will get official version by the end of march.
Guess, Samsung is testing all beta version simultaneously in different countries. Chances is there beta for other A series might not come for some phone in your region.
Good luck for that who're waiting for Beta Programme.
