[ctippett]

What can I say, other than we have very different experiences. Opening an .ics file from the Files app indeed shows its details, but selecting "Done" does nothing but dismiss its contents and adds nothing to the calendar.

Contrast this with opening the same .ics file from an email attachment or viewing it online, which presents an "Add All" button.

[kdtsh]

I thought, surely this can’t be right - but can confirm that this is the behaviour I see as well, opening a .ics file in Files lets you inspect the event but doesn’t seem to give you any way of importing it into a calendar (even from the share sheet). Maybe you could email the file to yourself but that seems like a pretty roundabout way of doing it.

Not that I ever get a .ics file from anywhere except my emails, but it would be nice to be able to actually use them if I have them.