Highly recommend the Logitech Combo Touch to all 12.9 users : r/ipad
Combo Touch Keyboard Trackpad Case for iPad Pro 12.9-inch 6th Gen / 11-inch 4th Gen & iPad Air 5th Gen
Keyboard Logitech COMBO Touch for iPad Pro 12.9-inch (5th generation) , SLO g. - Eventus Sistemi
LOGITECH Combo Touch tipkovnica in mapa za iPad (7. in 8. gen.), SLO gravura (920-009629) :: MLACOM
Logitech Combo Touch review: Not so magic keyboard – Six Colors
Logitech Combo Touch for iPad Air (3rd Gen. A2152/A2123/A2153/A2154) & iPad Pro 10.5 Inch (A1701/A1709/A1852), Keyboard Case with Trackpad, Wireless Detachable Keyboard, Soft Slim Cover, QWERTY UK : Amazon.co.uk: Computers & Accessories
Review: Logitech Combo Touch Keyboard Case with Trackpad for iPad 7
Review: Logitech Combo Touch is like the Magic Keyboard for iPad Air & 10.5-inch iPad Pro | AppleInsider
Logitech Combo Touch: A "Magic Keyboard" Accessory for iPad Air! - YouTube