- No dark mode
Android 9 should natively have an option to select Dark Mode in Display Settings. This option saves battery power and it's very useful. A80 Pro doesn't have this option. Please include it in the next release. - No (or late) notifications
Settings -> Battery -> Standby intelligent power saving - this option might shut down messengers or similar apps that continue to run in the background. (there was a similar problem with Blackview A10, also)