Huawei’s post-ban situation doesn't affect the Y7 Prime directly, but GMS (Google Mobile Services) on old EMUI versions is clunky. Many new apps require Android 9 (API 28) or higher. On stock Android 8.1, you are locked out of banking apps and modern games.
Huawei optimized the radio and camera firmware in a way that custom ROMs cannot replicate 100%. huawei y7 prime 2018 custom rom better