But either way, I still disagree with your comment that "all GUI apps on macOS and KDE (Wayland) have searchable menus", because this requires a menu system that is exported via a specific DBus protocol (https://stackoverflow.com/questions/75215820/how-to-implemen...), meaning it requires support from the application itself (possibly via some toolkit it uses), which IMO is demonstrably not "all apps".
Their own wiki page says it does not: https://community.kde.org/Plasma/Wayland_Known_Significant_I...
"Global Menu is not supported for non-Qt apps"
But either way, I still disagree with your comment that "all GUI apps on macOS and KDE (Wayland) have searchable menus", because this requires a menu system that is exported via a specific DBus protocol (https://stackoverflow.com/questions/75215820/how-to-implemen...), meaning it requires support from the application itself (possibly via some toolkit it uses), which IMO is demonstrably not "all apps".