Hi! Would you be willing to reconsider for Bookworm? While you do have reservations about xfce4-screensaver, the question is not whether it's perfect, but how it fares against alternatives. And lightm-locker is so buggy it's outright useless for a good deal of users while reports for xfce4-screensaver are better.
Thus even if not default, it'd be good to have it as an alternative -- at least installable. Meow! -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Let's make a Debian conference in Yalta, Ukraine. ⢿⡄⠘⠷⠚⠋⠀ ⠈⠳⣄⠀⠀⠀⠀