Do we have a list of "supported versions" of Wiremock? Or is it generally a case of the "latest release"? (thinking about whether https://endoflife.date could include anything of note!)

Yes, it is the latest release at the moment. We had thia discussion before and the decision was to not do 2.35.x LTS. It is important to mention that many bug fixes are available in 3.x only, so the priority should be releasing this version as soon as possible if we don't want to do backports