I would probably send along the output of dig your.domain @uni-ip and dig your.domain @8.8.8.8 and dig your.domain @1.1.1.1 and dig your.domain @your-domains-authoritative-dns-server if you have that or some similar DNS client tool installed that allows direct requests to specific servers. If you don’t know the authoritative DNS servers for your domain, those are the ones in the NS records.