Question about DNS functionality (I'm Japanese and using a translation app, so the wording might be awkward)

[hiroto14391]

Body
I'm running AdGuard as an app on True NAS, and I'm also running Nextcloud as an app.
Since it's running on True NAS, the IP looks like 192.168.3.○○:30027. However, when I try to add a domain to AdGuard's DNS system, there's no place to specify the port, and it connects to the True NAS UI instead. If there's somewhere to specify the port, or if there's a way to make this work, please let me know.　Sorry for the long message.