Not sure I can attend, but I second that Discourse should have some kind of presence around CCC. Outside of Germany it doesn’t have such a large footprint, but within Germany it’s very well known by engineers. In particular those who love to tinker with stuff, and have a community around the things they build - some of whom also have related jobs and decision power at enterprise companies and startups here.
https://www.youtube.com/@mediacccde/videos The videos are all in German, but just skimming the youtube channel should give a bit more context