In addition to this tuto : if you prefer a silent boot instead of verbose one once Plymouth is uninstalled, you can pass these arguments to your kernel:
LINUX_OPTIONS=“loglevel=0 rd.udev.log_level=0 systemd.show_status=false vt.global_cursor_default=0 consoleblank quiet”
This will lead in a full black screen once Bios logo is finished, and then connection to the desktop.