偶然HomePod miniのip addressがわかったので、ポートスキャンした結果を貼っておく
$ nmap $HOMEPODIPADDRESS
Starting Nmap 7.91 ( https://nmap.org ) at 2021-01-02 13:46 JST
Stats: 0:02:47 elapsed; 0 hosts completed (1 up), 1 undergoing Connect Scan
Connect Scan Timing: About 98.37% done; ETC: 13:49 (0:00:03 remaining)
Nmap scan report for 192.168.10.105
Host is up (0.11s latency).
Not shown: 995 closed ports
PORT STATE SERVICE
5000/tcp open upnp
7000/tcp open afs3-fileserver
7100/tcp open font-service
49152/tcp open unknown
62078/tcp open iphone-sync
49152のunknownはApple AirPlay dynamic mirroring TCP port.らしい
62078のiphone-syncは音楽のSyncに使われているみたい