Apple's Magic Keyboard for iPad originally came out in 2020 and is designed for iPad Pro and iPad Air. It comes in two sizes, one for the 11-inch iPad Pro and the iPad Air ($299 / £319) and one for the iPad Pro 12.9-inch ($349 / £379).
The most expensive iPad case that Apple offers, it's both a cover and a keyboard. It's also the only case from Apple where the iPad seems to hover above the keyboard, rather than resting on it. This means you can adjust the viewing angle with more precision than say the Smart Keyboard Folio, which only has two viewing angles.
