Who can create Automation Journeys? Follow

Users with “Manage Automation” rights can create, delete and update automation.

To Assign Roles and Permissions for Automation. Please perform the following steps. 

• Navigate to your Profile Icon in the top right corner.
• Go to Setup
• Head over to Profile Permissions 
• Click on Users & Security.

• Edit the relevant Profile
• Under Admin Operations Label Enable - "Manage Automations"

By default, Administrator users will have "Manage Automation" permission enabled.