Looking for a Calendar-Syncing Solution with support for subscribing to external Ical Calendars. - Lemmy.World

Hey there. I am looking for a Calendar-Syncing-Solution that can: 1. Sync CalDav Calendars between Phone, Laptop and Desktop 2. share certain Calendars with other Users on my Server 3. subscribe to external Ical Calendars and make them available to (certain) Users but nothing i looked at seems to support my Point Nr. 3. anyone know a good solution for me?