Actually i used two magisk mod. One is camera2api and the second is specific mod to fix front camera on xiaomi mi 8 lite. To find this just search night sight xiaomi mi 8 lite in Google
For me with xiaomi.eu rom with Android 9, *no-support-for-this-app-on-this-forum* works perfect. I was installed camera mods with magisk. Night sight and front camera works fine. Before with Android oreo i was have a lot of problem.
I have the same problem, i can't find the way to do the front camera and night sight mode works. And face unlock stop works... Ive looking for info on Internet but nothing... Nothing works
Sorry for my bad english. I have the latest stable rom of xiaomi.eu on my xiaomi mi 5s and i noted that it still on android 6.0.. and it not happen with the weekly rom. So i have the question.. when xiaomi mi 5s recived android 7.0?