Yes, nose fillers and nose threadlift can be combined to give better results. This works very well in patients who have a very flat nose bridge or just needs that tiny bit of extra lift that the nose threadlift alone is unable to provide.
The combined procedure results in a higher nose bridge and more enhanced nose contours and definition. However, not everyone will need a combined procedure. It really depends on your natural nose and desired outcome.
It's best to consult your doctor before the treatment :)
Hope this helps!