Official Raspberry Pi Keyboard - Black and Gray : ID 4112 : $18.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: PRO OTG Adapter Works for Samsung Galaxy S20 Plus 5G for OTG and USB Type-C Braided Cable. Use with Devices Like Keyboard, Mouse, Zip, Gamepad, hdmi, More (Silver) : Electronics