By default a copy carries the name of the calendar it came from, which keeps the original title private but tells you very little when three calendars all feed the same destination. You can now write the title yourself, per calendar, using a template.
The template takes plain text plus two placeholders: the original event's name and the name of the calendar it came from. Writing "Work — {{calendar_name}}" labels every copy in a way you will recognise at a glance, while "{{event_name}}" passes the real title straight through for a calendar where privacy is not the concern.
Because it is set per calendar, one connection can pass full titles through while another shows nothing but a block. That is usually the shape people actually want: your own calendars readable, and the ones other people can see reduced to when you are busy.
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