First off, the most obvious option is changing the background of your lock screen ... Windows 11 notifications can be shown ...

The best thing is that the background of the lock screen can be set as per your requirements ... predefined list or choose something from your computer. For that, click on the Browse photos ...

Here, you can choose the color mode for your Windows desktop and apps – Light ... you can also turn on the option to show the lock screen background picture on the sign-in screen.