Just a quick post.
Keep in mind its just a suggestion.
Currently when selecting adguard dns in assistant, it update the nameserver to "126.96.36.199" which is the old one.
It could be replaced by new one (at their official site : How to set up AdGuard DNS) that is "188.8.131.52" and "184.108.40.206".
And they said that the old one would be closed soon, so its good to update now, so its not like suddenly the net stops lol.