If you want to create or manage multiple fleets, you will need to set up separate Meter accounts using different email addresses.
How to Manage Multiple Fleets
Create a second Meter account - Each fleet must be linked to a unique email address.
Log in separately - To switch between fleets, log out of one account and log in with the other.
Keep fleet data separate - Each account will have its own trips, drivers, and settings, and they won't transfer between fleets.