The new “Dynamic Content” region requires developers to rewrite existing code if they want to move to the new, refreshable region type from the existing “PL/SQL Dynamic Content”. A drop-in replacement package, tentatively called APEX_HTP, should be offered as a drop-in replacement for HTP.
For the million instances of the existing PL/SQL Dynamic Content regions out there.
Preferred Solution (Optional)
See my blog post at https://ora-00001.blogspot.com/2022/12/dynamic-content-region-in-oracle-apex.html