First of all HAPPY AND SUCCESSFUL 2021 for the DxO stuff !
Sitting in the home chair I found TopazLab has some standalone application, which are complicate and useful enough to involve to PL as a plugin ( Gigapixel AI, Sharpen AI, TPG to RAW AI, etc.). Think about.
Just found the JPG to RAW converter among others. Sometimes it would be useful, because PL is unable to do such conversion.
Downloaded the trial app and made a test conversion. The result was a DNG file.
Unfortunately, PL4 unable to open it, refer to an incompatibility issue.
Do you see any chance to investigate the reason ? For your reference, Adobe Camera RAW is able to open and handle.
You can find the full format list at https://topazlabs.com/jpeg-to-raw-ai/
For your reference, I upload the original ‘Beni_portré.jpg’ and the converted ‘Beni_portré-edit.dng’ files to your upload server under Bencsi folder.
By the way, TopazLab using same forum UI as you. Interesting.
It is a subject since years, I’m afraid there is a serious obstacle to do it.
If you want to raise a voting in this subject, open the Requests topic https://forum.dxo.com/c/dxo-photolab-early-access/requests/13
create a New thread and add one vote on the top left of the page ( of course after you describe your request )