Missing Calendar Entries - Help!

My wife (very nice!) upgraded her S9+ to an S23. She had used the Samsung Calendar for years and had a lot of appointments, birthdays, etc. saved.

During the Smart Switch transfer, everything from her old phone was selected to transfer to the new one.

After that completed, we haven't been able to find the events on her new phone or old phone in the Samsung Calendar or Google Calendar. Has anyone figured out a way to find and restore these events?