I believe these steps here will be able to assist you.
Open the Settings app.
Choose Lock Screen.
On certain Samsung phones, the Lock Screen item is found in the Device tab in the Settings app.
When you can’t find a Lock screen item, your phone may not sport this feature. Still, swipe the clock on the lock screen to confirm.
Choose Lock Screen Widgets.
Mess with the settings.
The lock screen settings are not part of the stock Android operating system. Do ensure that the master control icon or check box that enables lock screen widgets is activated. On Samsung phones the setting is called Multiple Widgets.