About hospitals, 1 possibilities exist (like "Prince County Hospital").
These are the principal cities: Sherbrooke, Summerside, Travellers Rest.
For supermarkets you have 2 places with "Walmart", "Atlantic Superstore" for example.
You can find 2 gas stations locally like "Petro-Canada", "Coast Gas" In term of charging stations you can find 1 places (like "efficiencyPEI - Summerside - Prince County Hospital").
Are you looking for an apartment for sale/rent? Or interested by a house? You can check that on Realtor.ca.