I have owned a /e/OS Fairphone for several months now, and I consider myself fairly familiar with the open-source ecosystem, including DAV synchronization, Nextcloud, and similar services.
However, I can’t understand how the /e/OS Calendar handles the synchronization of subscribed calendars.
On my Murena account, I can subscribe to calendars and see all the events online. However, on my phone, when I use the default synchronization app (similar to DavX5), I can see that the subscription exists, but the subscription URL is not transferred correctly, so the events do not appear in my phone’s calendar.
This issue occurs with every calendar subscription I create through my Murena account, including the default Thunderbird holiday calendars.