Embed the Store Locator on WordPress.com
Important: After embedding the code, set the height and width values to control how the Store Locator is displayed on your website.
For example:
Log in to WordPress.com and open your site.
Go to Pages and open an existing page or create a new one.
Click the three dots in the top-right corner and enable the Visual Editor.
Click the + icon and add a Custom HTML block.

Click Edit HTML and paste the widget code into the block.

Click Update, choose Preview, then Publish.

Note: Custom code is not supported on the free plan.