I've been trying to customize my lock screen for a while now but I'm running some issues now. I' running Ubuntu 21.10. I installed LightDm with "sudo apt install lightdm" but everytime I install LightDm, it never creates the lightdm.conf file in ¨/etc/lightdm/¨ neither lightdm-gtk-greeter that cames by default as I've seen from some tutorials. Inside ¨/etc/lightdm¨ there's only 2 files: an empty dir named: lightdm.conf.d and users.conf that have this inside:
#User accounts configuration
#NOTE: If you have AccountsService installed on your system, then LightDM will
#use this instead and these settings will be ignored
#minimum-uid = Minimum UID required to be shown in greeter
#hidden-users = Users that are not shown to the user
#hidden-shells = Shells that indicate a user cannot login
[UserList]
#minimum-uid=500
#hidden-users=nobody nobody4 noaccess
#hidden-shells=/bin/false /usr/sbin/nologin /sbin/nologin
Inside ¨/usr/share/lightdm¨ there are 2 dir: guest-session & lightdm.conf.d
Now, Inside that lightdm.conf.d there are some files:

I removed lightdm using: sudo apt rm lightdm, sudo purge lightdm, I used sudo apt-get autoremove after everything, I also deleted manually lightdm files from etc and usr, installed lightdm again and same issue.
One time lightdm.conf was created after installation but it was empty.
I know is a large text, I apologize for that but I'm new using Linux and I'm loving it so far, but I still want to customize everything I can and also learn.