how to use the fields associated with the address/location field

EiC4733 If you are using modern "Location" column as shown in my above response, you can get the fields associate with location field in power automate: 

Also, you can get the location values using REST API call using endpoint like: 

https://contoso.sharepoint.com/sites/wlive/_api/web/Lists/getbytitle('LocationList')/Items?$select=Title,MyLocation

Sample output: 

<m:properties>
    <d:Title>Location Item 2</d:Title>
    <d:MyLocation>{"EntityType":"LocalBusiness","LocationSource":"Bing","LocationUri":"https://www.bingapis.com/api/v6/localbusinesses/YN4070x13951153930869343075?setLang=en","UniqueId":"https://www.bingapis.com/api/v6/localbusinesses/YN4070x13951153930869343075?setLang=en","DisplayName":"Chhatrapati Shivaji International Airport","Address":{"Street":"Santacruz East","City":"Mumbai","State":"Maharashtra","CountryOrRegion":"IN","PostalCode":"400099"},"Coordinates":{"Latitude":18.96904754638672,"Longitude":72.82118225097656}}</d:MyLocation>
</m:properties>

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