[Noob question] Why journald isn't auto completing my user .service?

Hello!, so i have 2 services in my .config/systemd/user one of them is named flatpak-update.service, and the other find-and-delete.service. When i write journalctl --user-unit flatpak it autocomplete like any other command in bash, but if i try the same with journalctl --user-unit find it don't autocomplete, as the service didn't exist, but if i type journalctl --user-unit find-and-delete.service i list the service logs as normal, why it isn't autocompleting the name?, thank for any answer or suggestion