All calendar events randomly deleted itself?

I’ve been using the calendar app on my iPhone for years now - I always add my events on there and always kept them. Randomly, however, majority of my events all have been deleted from my calendar except for a few random ones that stuck around. I’m not sure what happened or why it deleted all of the events, but I’m very frustrated and I’ve been trying everything to get them back.

I’ve tried to mess with the settings by switching up the sync, restoring from an archived calendar, toggling the iCloud calendar off and on. Nothing has worked. Is there anything I can do to get all of my events back? Or have I lost everything for good? My iPhone is up to date on iOS 26.1.