If you run those commands without the +short you will see that the TTL values for those responses are less than 59 (which for Google Public DNS, indicates they

If you run those commands without the +short you will see that the TTL values for those responses are less than 59 (which for Google Public DNS, indicates they are cached, and explaining why the IP addresses shown are not yours). The o-o.myaddr.l.google.com domain is a feature of Google's authoritative name servers (ns[14].google.com) and not of 8.8.8.8. You can send similar queries through 1.1.1.1 (where you will see that there is no EDNS Client Subnet data provided, improving the privacy of your DNS but potentially returning less accurate answers, as Google's authoritative servers do not have your IP subnet, but only the IP address of the CloudFlare resolver forwarding your query.