LWC Map : How to open records upon clicking on markers and the list items?

Hello,

This Trailhead Module should provide you some inspiration that would help you achieve this 

Check out Create the Account Map Component on @trailhead #TrailheadGO 

https://trailhead.salesforce.com/content/learn/projects/develop-account-geolocation-app-with-aura-components/develop-account-geo-app-create-account-map-component