I am working on a MeshCore UI for the WHY2025 badge.
I have just released a very early (unfinished) version and I can help you flash that version.
There are also some required hardware mods (bodge wires). For those that don't yet have an antenna on their badge, I have complete kits available (6€).
More information: https://peetz0r.nl/badge
Exact location: https://39c3.c3nav.de/l/hsnl/
Ort
HSNL Assembly (Hall 3 foyer, orange table)