I've given up waiting. Moved to On1 NoNoise AI in On1 Photo Raw. Works pretty good. My workflow is still with Lightroom Classic, but if I need to improve noise processing I jump over to On1. Seems to work better than DXO.
So, since this issue hasn't been resolved for almost 2 years now... any update on the status? Is this still being worked on or has Adobe abandoned Pentax-users?