com.xiaomi.upnp
com.xiaomi.upnp
UpnpService
UPnP = Universal Plug and Play
It’s a protocol that lets UPnP-enabled devices on your network automatically discover and communicate with each other
For example it works with the Xiaomi Network Speaker (and probably a lot more Xiaomi IoT stuff)
UPnP has a lot of security issues and you proably should disable it on your router.
https://nakedsecurity.sophos.com/2020/06/10/billions-of-devices-affected-by-upnp-vulnerability/
This package is the Xiaomi implementation on Android (no AOSP support)