Not sure. However theres various endpoints offering "dns looking glass" service that allow pipelined HTTP/1.1 queries.1
With this "DNS over HTTPS", given a page of HTML containing pointers to various domains, using a simple script one can filter out all the domainnames it contains, format them into HTTP requests, send them to the "dns-lg" endpoint over a single connection, parse the response and append the answers to /etc/hosts or a local authoritative zonefile. Then one can browse the page, including following any remote URLs without having to do any DNS lookups.