Hi ECG354,
If this is in iOS 16, you can change the font, color and other aspects of the date and time, but cannot move the position of it.
See more info here: Create a custom iPhone Lock Screen - Apple Support
"Change the clock style on the Lock Screen
You can change the font and color of the date and time on your Lock Screen.
- Touch and hold the Lock Screen until the Customize button appears at the bottom of the screen.
- Swipe to go to the Lock Screen you want to change, tap Customize, then tap the Lock Screen image.
- Tap the time, then choose a font and color."
If you'd like to see a tweak to this, we'd recommend leaving feedback fr Apple here:
Take care.