Lead connect works flawlessly with Sales Navigator as well.
With this tool you can schedule a campaign/cadence:

Send a connection request to a targeted audience with a customized message. You can use place holders like {first name}, {last name}, {full name} and {company name} to customize connection message.

Schedule a follow-up message after a defined time interval to be sent out after the connection is accepted.

Setup multiple follow-ups until a response is received.

On Acceptance Log Current and all future activity to Hubspot