CalDav Tasks - Handle Subtasks

[LSeelig]

I am a novice both to this software and to outlook and caldav, so the following might be incorrect:

1. Outlook does not support subtasks
2. MS To-Do, which shows the same tasks as outlook, has sub-task support, but does not sync them with classic Outlook. It has its own API, but that is beyond the scope of this project.
3. CalDAV has a property RELATED-TO for facilitating subtasks.

When I add subtasks to my CalDAV tasks, these subtasks are just synced into Outlook as ordinary tasks, causing clutter and confusion. Would it already be possible to (or possible to implement)
a. Prevent the syncing to Outlook of tasks that have a UID in the RELATED-TO (subtasks)
b. In addition, append the names of the subtasks to the description of the parent task (the UID in RELATED-TO)?

I would imagine B would require some logic to sync and update properly, but A would hopefully be more realistic. Either way, either would be an appreciated advanced option, if not a default.