To automate LinkedIn outreach, you'll need to build a Playbook that has LinkedIn steps then enroll a contact into that Playbook.
Navigate to the Playbooks tab here.
Create a new Playbook by clicking "Create Playbook"
Click "Add to Playbook"
Add a LinkedIn Step: Automated Connect or Automated Message
Set the Playbook live by clicking "Start Playbook"
Enroll a contact into the Playbook.
Select multiple Deals using the checkbox
Click the ‘Playbooks’ Button
Add to Playbook
Click Enroll next the Playbook you want
Open a Deal
Click the Playbook Icon next to a contact
Click Enroll next the Playbook you want