Version 6.9.3(776).
I set up a phone that I had updated to iOS 17, reset, and with a new account yesterday and enpass was downloaded yesterday.
it appears Apple has changed how air drop works - see https://developer.apple.com/forums/thread/737971?page=1#767265022
However, even if one cannot avoid saving the file, opening it is the issue.
btw if you share via iMessage it still works.