If you click the 3-dots to the right of the map title (top-left of the screen), there's an option to embed the map. But first, the owner of the map (outback97?) will need to make the map "Public on the web" - this should only make the map viewable to the public though, not editable.
Once the permissions are set, the embed option will then generate a blob of HTML that you can copy and paste into a Wordpress page. To make sure that actually works, I made a quick copy of the map, and setup a test page on my Wordpress site:
https://joshbuhler.wordpress.com/map-test/
Seems to work ok.