Link 6 (tun0)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=allow-downgrade/supported
Current DNS Server: 10.10.55.250
DNS Servers: 10.10.55.250
DNS Domain: ss
Again, what exactly is that goes wrong? This looks perfectly fine.
What happens when you try to resolve whatever_host.ss which is supposed to go to 10.10.55.250?
Can you ping that server?
Can you resolve hosts by using nslookup and connecting directly to it?