Magic Keyboard backlight manual settings not working

I have the 2024 IPad Pro 13” with the 2024 Magic Keyboard. I read on Apple that I can use the manual setting to adjust the keyboard back lighting with the slider in settings. However, my slider is disabled even after I have iOS 17.5 installed. Am I missing something? I did see the keyboard light come on once but even after using the control center option, I cannot manually adjust the backlighting. Thoughts?