Hi, to disable navigation at all (or to modify it), you can use this C++ code:
TSharedRef<FNavigationConfig> navigation_config = MakeShared<FNavigationConfig>();
navigation_config->bTabNavigation = false;
navigation_config->bKeyNavigation = false;
navigation_config->bAnalogNavigation = false;
FSlateApplication::Get().SetNavigationConfig(navigation_config);