If your Google Maps locations aren't loading on the homepage or search modules even though you already went through the Initial Set Up Steps use the Inspect tool to check which error is being presented inside the Console, it's most likely because your key is missing an API:
I am using the Inspect tool to check for the error inside the Console while on the page presenting the issue using "CTRL + SHIFT + I" or right click on your mouse:
The three main APIs that are covered in this article are:
4. Click on the API and make sure that it is enabled if not, enable it:
This process is done for any missing API on your site.