I got it from Apple. This is the one for the M4 11”Where did you buy your Logitech from because it's only available for pre order on their website but you already have it? Did you buy it from Amazon?
Logitech Combo Touch Keyboard Case for iPad Pro 11-inch (M4)
Logitech Combo Touch keyboard case for iPad Pro protects your device and features a flexible kickstand and detachable keyboard. Buy now at apple.com.
www.apple.com
Or visit this page and then use the “iPad compatibility” filter to find the one for your iPad.