sh-3.2# systemctl --failed
  UNIT                            LOAD   ACTIVE SUB    DESCRIPTION
● dev-bfqio.mount                 loaded failed failed Droid mount for /dev/bfqio
● dev-cpuctl.mount                loaded failed failed Droid mount for /dev/cpuctl
● dev-cpuset.mount                loaded failed failed Droid mount for /dev/cpuset
● dev-stune.mount                 loaded failed failed Droid mount for /dev/stune
● mnt-secure.mount                loaded failed failed Droid mount for /mnt/secure
● jolla-devicelock-encsfa.service loaded failed failed Nemo device lock daemon
● [email protected]      loaded failed failed Handle udisks sd mount
● ohmd.service                    loaded failed failed ohm daemon for resource policy management
● systemd-logind.service          loaded failed failed Login Service
● udisks2.service                 loaded failed failed Disk Manager
● usb-moded.service               loaded failed failed usb-moded USB gadget controller

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

11 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.