Windows 11 shows widgets on the lock screen. If you want you can remove the Lock Screen Widgets in Windows 11 by following this post.

One area of Windows 11 that offers some customization options is the lock screen the screen you see when you first boot up your computer, before signing in to your account.

The latest Windows 10 preview build contains a hidden feature ID that lets you add even more widgets to the lock screen. Now, besides the weather, it displays stocks, traffic, sports, and more.

Just because you're still using Windows 10 doesn't mean you're safe from the new lock screen widgets. Open the Settings app on Windows 10 and go to Personalization.