To set up the location filter widget on your Business Listing page, please follow these steps:
Insert Google Map API Key
Navigate to WB Plugins > Business Profile > General.
Insert the Google Map API key in the highlighted field, as shown in the attached picture.

Fill in Contact Information
Navigate to Single Business Settings > Contact Info.
Fill in all the required details and the address field, It will be an autocomplete field.

Assign the Location Filter Widget:
Go to Appearance > Widgets.
Search for the “Business Search Filter Widget” and assign it to the sidebar of the Business Listing page.

Verify the Widget on the Business Listing Page:
Visit the Business Listing page. You should see the location filter.

Note: If no location is added for any business, the widget will not display.
