More recently, teams have been attending hackathons with an already completed product, using the event to attend VC meetings instead of doing any hacking. And when they invariably win with a well done, complete product they use the media announcements to generate leads. My duct-tape and cardboard hack doesn't look very good but we designed and built it within the team we assembled 48hours ago.
G0v hackathons in Taiwan are still this, at the end everyone presents what they worked on and there's no judging or anything. Some of the projects have been going for years.
There was a hackathon two weeks ago, you can see all the videos from all the demos here https://m.youtube.com/@g0vTW
They happen every two months. Some people have started g0v chapters abroad, maybe you could consider it for your region!
I had the chance to attend the LibreOffice one back in 2023 but life got in the way and I missed it sadly.