which communication tool is offering that? except web forums, discourse?
most others you need to go an extra step to make the messages public, like mailing list archives.
there is this: https://github.com/zulip/zulip-archive
i haven't used it, just saying that solutions exist.
and with the constant hammering of sites by AI bots you probably don't want them hitting a dynamic message interface but prefer a static copy.
