No live preview & SEO plugin cannot find content on page
Pretty simple answer - the .env file was not showing the correct primary site i.e.
PRIMARY_SITE_URL=https://www.XXXXXXX.com

http:// XXXXXX 

should have been
https:// XXXXXX

very embarrassingly for me, this error was clearly displayed in the console log of the live preview site i.e.

navigate to the live preview page
enter dev tools
view console for the log errors

There is also another post of this issue as well:
Live Preview not loading - https / http conflict
(I'd like to suggest this post be left open as I had previously seen that post but did not attribute it to this issue - possibly due the double digits spent infront of the screen...)