I recently let my Nokia 3.1 to upgrade to Android 10.
I don't know if it's Nokia's will or Google's but rounded black corners appeared on my screen, and are kept permanently visible during any app runtime.
Is there a way to remove this feature ? I have found nothing in the system configuration menus. I also tried some app implementing custom corners but apart to add another layer of corners, it can't remove the ones I initially want to disappear.
Some pictures:
The rounded corners don't appear in screenshots.