Missing Email

We recently started using ZohoMail we migrated our users from google workspaces. The migration process seemed to have gone smoothly however not all emails are showing in the inbox folder.

For example: If I sort the inbox folder from old to new. (Oldest email first) The oldest email is from 2023. I should have emails from way back from 2017 but they do not show in the inbox folder. However, if I do a search with the Date To: 01/01/2018 I can see the emails from before that day, and the search shows as they are in the inbox folder.

In my IMAP email client I can also only see until 2023.

Any ideas why is this happening?