With the latest alpha build of the MIUI launcher, v4.10.6.1025-06141703, Xiaomi devices are getting an app drawer. Users need to tap on the button to open app drawer, swiping from the bottom doesn't works yet.
Long-press on the home screen, tap Settings, select More. Here, you’ll find an option in the Chinese language under “Home Screen Settings.” Tap on it and it will open a page with two options for the home screen, select According to image below.