check dnsleaktest website and see which servers are returning, if your dns is google or is your isp dns you will know there.
if you want more privacy replace your dns servers with cloudflare o quad9, if you want more privacy maybe consider upgrade to DNS over TLS (DOT) or HTTPS over DNS (DOH).
You can do this with a dns filtering server like AdguardHome or Pihole. While you block ads and telemetry in your network.
and if you even want to level up consider selfhost your own recursive dns server with unbound + AdguardHome or Pihole.
check dnsleaktest website and see which servers are returning, if your dns is google or is your isp dns you will know there.
if you want more privacy replace your dns servers with cloudflare o quad9, if you want more privacy maybe consider upgrade to DNS over TLS (DOT) or HTTPS over DNS (DOH).
You can do this with a dns filtering server like AdguardHome or Pihole. While you block ads and telemetry in your network.
and if you even want to level up consider selfhost your own recursive dns server with unbound + AdguardHome or Pihole.