It is now possible for drivers to get a Restricted Class 4 Drivers License to offer ride share services, but it is my understanding that most of these businesses are currently still working on starting their business here. I’ve heard that RedRide is close to being ready to offer this service on Prince Edward Island, but I would recommend contacting them directly for the most up-to-date information. From their websites, Uber and Lyft have indicated that they have not yet started to offer rides on Prince Edward Island. Other options for transportation on Prince Edward Island are taxis, T3 Transit, Maritime Bus, shuttles, City Beach Express and car rentals.
I hope that this is helpful for you!