Well, you’re pretty much out of luck. There used to be a method where you could save your icalendar as an .ics file if I remember correctly, using Firefox with an icrewmax add on extension. Icrewmax stopped supporting versions newer than 57 of FF browser. I suppose you could download the old version 57 if you can and then use the icrewmax add on extension but that’s a lot of trouble to go through. There is one way to that your wife can see your schedule the exact same as MiCrew. It’s not condoned by me. 🤓

There used to be a way you could do this in your iCloud account but Apple has disabled the feature.