The Okta connector currently captures deletes through the use of a re-import strategy for the Users table, as outlined in https://fivetran.com/docs/connectors/applications/okta#syncoverview:

We also re-import GROUPS and USERS tables once a week to capture the deletes.

An alternative solution to track deletes that would not require a re-import is to utilise Okta's event hooks: https://developer.okta.com/docs/reference/api/event-hooks/. 

When you register an event hook, you need to specify what events you want to subscribe to. To see the list of event types currently eligible for use in event hooks, use the Event Types catalog and search with the parameter event-hook-eligible.

There is an event named "user.lifecycle.delete.completed" that can be specifically used to track the deletion event of a user. 

Can Okta's event hooks be utilised to capture User table deletes?