Older Calendar items imported from Outlook

New to eM Client.  Had been using Outlook for many years.  When importing older Outlook calendar (recurring and non-recurring) items, “some” show up in the Agenda list in the right side panel, but do not show up in the full page Calendar view.  Others dont show up at all in either view.  It also does not Find items when searching.  My OLDER calendar items go back to 2006, but the list only shows recurring ones.  Where are all non-recurring items?

What are the rules for importing old Outlook calendar items?

Hello,
are the non-recurring items that do not show up in Agenda past events or ones that are still ahead? Or does is not show any non-recurring items at all?

Best regards,
Olivia

Problem solved - it did not select to show all agenda items