This would be great if we could have the option to have sort of "subcalendars" or even labels could work too.

The issue I'm having is that currently, I have one calendar for "Meeting", "Medical appointements", "Party", etc... But in the end, I would like to put them all in a "Personal" calendar (as opposed to "Professional" for exemple). So that I can share my personal calendar with someone so that they can see my availability or stuff like that.
The way it works currently, by having separates calendar for everything is that I have to share all of them, or create a "Personal" calendar that would be a duplicate of all of them. None of those solution is very practical I think.

Labels could work too because even though you can't really share a label, at least it helps with the personal organisation very much. Like I could have my "Personal" Calendar and different label attached to each events corresponding to the categories mentioned earlier (for exemple).

Overall, I think more ways to manage and organize calendars, whether that be with "subcalendars/sucategories", "labels", "folder" or anything else if someone has a better idea would be suitable.