Hi Lily,
The Connectors Run Modes feature should be turned on in everyone’s account now that we have passed the General Availability date for the Summer Release.
When you click into a Connector within the account in question - you should see a Schedule field - clicking on this will make the “Run Mode” field visible:
This is visible on the Connector Summary page, so you won’t see this option until you create a Connector.
Let me know if that helps - or if you still aren’t seeing it, there may be something else going on that we can dig into!