I’ve had a few functions kicking around in my config that kinda-sorta bridge org-ql and org-roam. I started putting it together as a package: GitHub - ahmed-shariff/org-roam-ql
The idea was to make org-ql aware of the org-roam database and narrow its search based on that. I am still ironing out some kinks in the implementation. Please feel free to try it and provide any feedback.
Thank you.