schedule shutdown/turn on

You now need to use Terminal to adjust these settings. Apple has removed them from the macOS GUI.

See:

https://support.apple.com/guide/mac-help/schedule-your-mac-to-turn-on-or-off-mchl40376151/mac

For example if you want to use an on/off schedule daily then this is an option to apply in Terminal using macOS Ventura. The following command is for the whole week. You can leave out days by removing the sub-sequential day letters. You can also change the time. sudo pmset repeat wakeorpoweron MTWRFSU 13:00:00 shutdown MTWRFSU 02:00:00

To remove this command from Terminal use: sudo pmset repeat cancel

Schedule your Mac to turn on or off in Terminal - Apple Support