Ah ha!!
Found it.
In Windows 11
"The only ones you can configure are the 3D text and Photos options. In the 3D text settings, you can create a custom message, control the visual style, speed, motion, surface style, and more. And in the Photos option, you can choose the folder with the collection of pictures you want to show on the screen, and there is an option to control the speed and rotation."
https://www.windowscentral.com/how-enable-screen-saver-windows-11
CASE CLOSED.