What if I told you that you could have had that greeter too in 24.04 by only issuing two commands ? 
sudo apt purge arctica-greeter*
sudo apt install slick-greeter
It might be good to know that slick-greeter (the one with the GUI config) has been the default for years until arctica-greeter came along.
25.04 is luckily and understandably reverting back to slick-greeter but slick-greeter has always been installable from the standard repository in literally every release of the past decade. 