Sign in to LastPass web -> Advanced Options -> Export -> Verify export by email -> Advanced Options -> Export (again) -> List of passwords in CSV format.
The problem is if you aren't a paying customer, and you are locked to the mobile app, it doesn't have the password CSV option. So if you can access the desktop web option, sure, it works. But that's not true for all users.
Sign in to LastPass web -> Advanced Options -> Export -> Verify export by email -> Advanced Options -> Export (again) -> List of passwords in CSV format.