Hello Chris197, welcome to the Microsoft community, I'll be happy to help you today;
I understand that the option "Set time automatically" is missing in your Windows 11;
Recommendation that you are up to date with the latest version of Windows 11;
press the Windows key + and go to Windows Update;
Click Check for updates and do ALL pending updates;
Run the system file checker;
Click on the Windows search bar and type: CMD
The result of the search for CMD (Command Prompt) will be displayed, click Run as administrator;
Copy and paste the command line commands below Type after typing each command line:
Sfc /ScanNow
DISM /Online /Cleanup-Image /ScanHealth
Dism /Online /Cleanup-image /RestoreHealth
Wait for the process to finish and restart the pc;
Check if the Set time automatically option is back;
I hope I helped, even more!