The Xiaomi Pad 7 Pro and Mac use mDNS (Multicast Domain Name System) packets to discover each other for screen mirroring. In enterprise networks, IT departments often implement multicast/broadcast isolation to prevent excessive traffic on wireless access points (APs). This isolation blocks mDNS packets from being transmitted across network segments, which can prevent the Xiaomi Pad 7 Pro from detecting the Mac for screen mirroring.
To resolve this, it is recommended to use a personal router, as it does not have multicast isolation and allows devices to communicate freely.