So a while ago I was looking for a Rain Cover / Roof for the Keypad of the U200, but I couldn’t find a proper one I liked on Makerworld, so I decided to create one myself. So if you have a 3D printer, download and print it yourself!
https://makerworld.com/en/models/2185728-aqara-u200-keypad-cover-roof
It just slides over on the keypad, no screws or anything needed.