Hi Paul,
This solution is not working anymore with J4 because HD-ArticleMod (hyde-design.co.uk) is not updated yet.
I have also tried the soution you mentioned at one forum -
https://www.joomshaper.com/forum/question/7823
Addind unofficial add-on - shortcode HTML
but it is not working with RegularLab Article Anywhere.
Though shortcode of Events Booking works in SPPB but not this Article Anywhere.
I just wanted to check what's the solution to display Full Single Joomla Article or SPPB Page inside another SPPB Page?
One more thing,
solution that you provided at many forum about using "HD-ArticleMod" is not practical when you have to do this process for multiple for many many articles. Because it is an extra step.
Easiest would be to use "Article Anywhere" extension.
Your help will be appreaciated.
Thank you.
Rahi