https://www.techradar.com/news/android-9-pie-just-launched-so-samsung-announced-12-of-its-devices-will-get-android-8-oreo

Samsung announced an Android 8.0 Oreo update schedule for its mid-tier phones and tablets, so you may be in luck if you have an older or budget device like the Galaxy J7 or Galaxy A9. 

Yes, Android 9.0 Pie is already out on the Google Pixel 2 and other Pixel handsets, but some of Samsung’s devices won’t be getting Android 8.0 Oreo until January 2019, reports AndroidPure.