Can't add search domain in Wireguard Android App

[Alexis Geoffrey]

Hello,

I'm not sure if this has been posted before, but I am unable to add a
custom search domain to the "DNS servers" field of the Wireguard
Android app. The app responds "Cannot parse IP address "<my local
domain>" in Interface's DNS." Is there an alternative way to do this
on Android, or will this feature be added in a future update? Or is
simply a result of running wireguard as non-root, and so this is
impossible on an Android phone?

Thanks,
Alexis