Rumour has it that Apple has a second-generation Magic Keyboard in development. The keyboard accessory will apparently be compatible with the iPad Pro and the rumoured fourth-generation iPad Air. The new keyboard is scheduled to arrive in March 2021, a year after Apple released the fourth generation of the iPad Pro.
https://www.notebookcheck.net/Apple-may-release-the-second-generation-Magic-Keyboard-in-March-2021-with-compatibility-for-the-fourth-generation-iPad-Air.485205.0.html