Bonjour,
Agendav has been fully rewritten (Slim 4 + PHP-DI 7, PHP 8.5) and now ships 3.3.0 with native SSO support and the YunoHost reverse-proxy fixes merged in. And the shared calendars are now available 
I have a PR ready to catch up to that release and modernise its packaging for YunoHost 12 / PHP 8.5.
Is it possible to unarchive the agendav_ynh project so I can propose it?