Looking at the output of that command I get the following for my ethernet network interface

   DNS-Server  . . . . . . . . . . . : fd98:1919:5915:0:3053:4134:bdc9:295d
                                             192.168.1.60
                                             fd98:1919:5915:0:3053:4134:bdc9:295d

Using nslookup on that IPv4 address tells me that all of those addresses are pointing to my pi-hole

nslookup 192.168.1.60

Server: pi.hole
Address: fd98:1919:5915:0:3053:4134:bdc9:295d

Name: pi.hole
Address: 192.168.1.60

I’ve added another local DNS entry on my Pi-Hole which points the domain I use to the same server but this time uses its IPv6 address. That doesn’t seem to help though or it takes some time to update. I flushed the DNS cache on my machine after adding this entry though.