Hi @Kostya1, welcome to the /e/ forum.
I think important to identify was the phone previously on Android 8, Oreo stable, so that this was indeed the “new” OS OTA Upgrade of S9 / S9+ to Android version Upgrade to Android version 10, Q. This was released, as a one click upgrade. Please follow these links to confirm your situation. Was the phone an /e/Solutions purchase? You could report this and ask for advice at helpdesk@e.email.