Unable to delegate any calendar to anyone
I have an iPhone 12 Pro Max on IOS 16.1.1. I have 4 different accounts with calendars (iCloud, Hotmail, Gmail, and Exchange). I am able to "share" an iCloud calendar with my wife who is designated as "family" through the Calendars app, but I unable to delegate any calendars to anyone through Settings -> Calendars -> Delegate Calendars. The "Add Person" link exists, but when I click on it, no one is listed, and any search yields 0 results.
Ideally, I would like to be able to share a detail-less version of my work calendar with my wife in order to help her see if I'm busy or not, but the bigger issue here that I'm noticing is that I completely lack the ability to delegate any calendars on any account.
I suppose I would appreciate help with either issue, but the inability to delegate has me concerned that something is flawed that might impair my ultimate goal.
iPhone 12 Pro Max, iOS 16