Add and Share Subscription URL to iCloud Calendar

Does iCloud Calendar support subscriptions and then share the subscription using iCloud Family Sharing?

For example, this URL points to the schedule for Homecoming activities; there are entries on October 3 and 8:

srv2-advancedview.rschooltoday.com/public/conference/ical/u/3d5dd198e4f26d730cdc2e21a75834dd

Two Questions:

1. Is there a way for an iCloud Calendar to subscribe to this URL? (You can do so on macOS Calendar, but I can’t see any way for an iCloud Calendar to add a subscription.)
2. Assuming it is possible for iCloud Calendar add subscriptions, can the resulting iCloud Calendar then be shared to members of iCloud Family Sharing?

My goal is to find the easiest way to add multiple calendar subscriptions to each family member’s iOS calendar.

Yes, of course, I could email all the URLs to each of them, and then they could each go through the tedium subscribing to each URL at:

Settings → Calendar → Accounts → Add Account → Other → Add Subscribed Calendar

I think that it would be a lot easier (and less error-prone) if I were to add the subscriptions to our iCloud Family Sharing Calendar and then invite each of them to join.

Other suggestions?

[Link Edited by Moderator]