I am not seeing the DPI settings documented here https://docs.digikam.org/en/setup_application/miscs_settings.html#system-settings I see and use them in 8.2.0
The Windows version now uses Qt-6. The High DPI setting is now always active and can no longer be deactivated, which is why this option no longer exists. What problem do you have exactly with the display of digiKam? here are no problems here on different Windows computers. Maik