Webcal public subscription to task list

Steps to reproduce

Searched for the option to make a task list public and shareable via webcal in Calendar and Tasks apps. Found none.

Expected behaviour

Being able to publicly share a task list via webcal link (preferable).

OR

Being able to sync task list as CalDav calendar in addition to standard task sync.

May sound strange at first, but it's incredibly helpful on wearables. I don't know any CalDav todo on Tizen or Wear OS but all watches I've seen can sync with local calendar and display all its events.

Other scenario is to join .ics task list with other calendar accounts in some calendar app to see tasks with due time and appointments in one place.

So, mostly it's for today's agenda view, being able to see your tasks on your watches and joining task lists with external calendar appointments.

List of activated apps:

Calendar 1.7.0
Tasks 0.11.0

Server configuration

Used https://demo.nextcloud.com/ without any changes

Start by reviewing the Tasks and Calendar integration points related to webcal and CalDAV, using the reported Calendar 1.7.0 and Tasks 0.11.0 versions as context. Compare the requested public webcal subscription with syncing tasks as a CalDAV calendar; done means one approach has a defined implementation scope and acceptance criteria.