On 2025-01-07 the QUERY HTTP method, "a safe, idempotent request method that can carry request content." has reached the level of a Proposed Standard consensus and is on track to become a Proposed Standard.
It solves the problem of making complex queries where the GET method is sometimes sufficient as it (according to the standard) lacks support for sending the query in the body, leaving only the query part of the URL which is limited. An often used workaround of using the POST method has a downside in that it's just the wrong method for this purpose as queries do not cause side-effects and this limits the retryabilty and cacheability of such queries.
Therefore It would be great to implement support for QUERY in Net::HTTP.
Note that for example node.js has implemented and released support for it in June 2024: nodejs/node#51562
If you are open to it, I am interested in providing a PR.