Some QRemeshify tips, with special thanks to @Denyalife 
- Sharp Detect
For hard-surface meshes, mark sharp edges / edge loops, turn on Sharp Detect and set the angle value to an appropriate value.
- Preprocess and Smoothing
In a medium density mesh, the Preprocess option works well. But with complex meshes, like cloth folds penetrating themselves, detail is lost. Turning Preprocess off can fix this, but can result in much more polygons.
Switch off Preprocess if you want QRemeshify to consider edges marked as sharp.
Smoothing can also improve the result, staying closer to the source mesh details.
- Scale Factor
The larger the Scale Factor number, the larger the polygon size. In such a case, try a Scale Factor of 3. But beware: with a Scale Factor value that’s too high and Preprocess disabled, the result can turn out worse than when you’ve got Preprocess enabled and a Scale Factor of 1.
- Alpha
The default Alpha value is 0.005, and that’s usually fine. But in case of tight corners, try changing the Alpha parameter to a higher value.