(A tester...)

Un systemd sous debian via WSL : genie
    # curl -s https://packagecloud.io/install/repositories/arkane-systems/wsl-translinux/script.deb.sh | bash


Car non, systemd n'est pas utilisable out-of-box sous Debian via Windows SubSystem Linux.
Voici l'erreur avec un systemd natif :
    # systemctl enable --now mongod
    System has not been booted with systemd as init system (PID 1). Can't operate.
    Failed to connect to bus: Host is down