You mean the congress? It's not taking place this year: https://events.ccc.de/category/37c3/#no-congress-2022-en Instead they defer to decentralized events across Europe: https://events.ccc.de/ Many of them offer livestreams.
What's this hygiene stuff they're talking about? Did they get in trouble with the venues over attendees not showering or something?
When the organizers decided this, it wasn't yet completely obvious that Covid would be "over" by fall.