🌏Can I set the service to a specific location so that bookings cant come in from far away?

Requires a third party application

To restrict clients from specific locations you will need to use a third party application such as LockOn or something similar

The goal would be to restrict people from specific locations from entering specific pages on your Shopify store

LockOn‑ Restrict Store - Restrict access and lock store content by tags, location, etc. | Shopify App Storeapps.shopify.com