

KDE Connect can transfer files over WiFi, it’s likely preinstalled on anything with KDE Plasma (eg SteamOS has it by default in the desktop mode), but it can also work with GNOME with the gsconnect extension. There’s also LocalSend, Syncthing and probably many more


Just adding the file as you did should make it appear there right away, so make sure your .desktop follows the standard and syntax is correct.