Calendars and two factor authentication
Hello,
I felt my iphone 13 Pro Max had been hacked -- my shared calendars were disappearing so I reset my iphone. As I attempted to bring my shared calendars back into the calendar program, I was prevented from attaching because of the two factor authentication. I can attach them through iCloud, but I would prefer they be attached to the calendar app on my iPhone. Please let me know if I am doing something wrong or what I can do to make this happen. Thank you.
iPhone 13 Pro Max