I'm using it and it works fine. Don't know what to tell you. Make a log during boot or something.
https://xiaomi.eu/community/threads/logging-with-adb-logcat.63684/
I'm not roasting. There's no way for us to know what the problem is.
Also, "Mi Mobile", "Mi SIM" and "Mi Roaming" items are not supposed to be visible on our ROMs, so there's something wrong with your setup.
Try clean flashing.