There are some options that you’ve got the option to configure for the lock screen.
Press the Super key, then jot down Screensaver and hit enter.
Once in the screensaver controls, switch to the Customise tab.
The clock is enabled through the Always show the clock option.
you’re free to enable and configure the appearance of the clock on the lock screen.
punch the current font to open a window that allows you to select a new font and font size.
you could add a custom message to the lock screen if you want.