Why doesn’t iphone 13 associate downloaded .ics (iCal) files with the iOS calendar?

On iPhone 13, when I am on a website that offers a link to an .ics file containing one or more event and I choose to download the file, the iPhone does not give me the Calendar App as a suggestion to open the file. It seems to me, that there should most definitely be an association. Why is there not?

Also, I am aware of the steps to otherwise subscribe to a URL, but I feel like that is too much work.

the iPhone Calendar app should be able to handle importing an event from an ics file JUST as you can do on a MacBook.

What am I missing? Is there an issue with my phone, or did Apple decide to not make the association for some reason?

Why doesn’t iphone 13 associate downloaded .ics (iCal) files with the iOS calendar?
 
 
Q