The Theurgy-class is a homage to Adam Ihle’s Odyssey-class, which recently became canon in the Star Trek: Picard comics. The Theurgy has the MVAM-capacity of the Prometheus-class (see above), and the 3D model shows the refit of the ship. It was a commissioning by Omar Tavera (Omardex) on Artstation (https:www.artstation.com/omardex), and make sure you go see his awesome work. The model and its concept is owned by me, but this project could not have turned out as great as it did without Omardex. It was made in Cinema 4D, but this version on Sketchfab is a scaled down and simplified edition of the real 3D model since the load time was far too long for viewing convenience.
This 3D model is owned by Auctor Lucan (https://auctor-lucan.deviantart.com) and Star Trek: Theurgy (https://www.uss-theurgy,com/forum/index.php), and may not be featured elsewhere than in the Theurgy story.
Here is a link to the full information on the ship.