Apple Says New 12.9-Inch iPad Pro is 'Functionally Compatible' With Older Magic Keyboard, But Fit May Be Imperfect When Closed

The new 12.9-inch M1 iPad Pro is 0.5mm thicker than the previous-generation version, which has led to fears that it won't be compatible with the older Magic Keyboard. Apple is offering a new Magic Keyboard that offers a perfect fit, but Apple says you can still use your existing 2020 Magic Keyboard with a 2021 ‌iPad Pro‌.
In a Magic Keyboard support document, Apple says the first-generation Magic Keyboard is "functionally compatible" with the fifth-generation ‌iPad Pro‌, but