Apple has updated iMovie and the iWork suite of apps for iOS and iPadOS. Among the many changes across the four apps, the main one is the added support for mice and trackpad support on iPads running the latest version of iPadOS. It also adds support for the Magic Keyboard accessory for the iPad Pro models. The updates also bring some other useful changes, such as keyboard shortcuts and support for PNG, BMP, GIF and TIFF images in iMovie, color, gradient or image as background in Pages, background color in Numbers, new themes in Keynote, and ability to add a document to iCloud Drive...
Source: https://www.gsmarena.com/apple_updates_imovie_and_iwork_suite_for_ipados_with_mouse_and_trackpad_support-news-42383.php
