Can fillers give a pinched nose a rounder appearance and more of break at the tip rather than a straight profile?

During a non-surgical rhinoplasty, filler is added to the nose to fill
areas of depressions. Depressions can cause the appearance of the nose to
look crooked, have a hump/bump or make the tip look narrow. Filling in these depressions will
create a nose that looks straighter, make a bump look smoother or smooth the tip.  I believe you had a great result from your rhinoplasty, but you would be a good candidate for a non-surgical rhinoplasty is you wanted to make a subtle change to the tip.  After using numbing cream on the skin, it is a rather pain free. It
will swell for 2-4 days and there is little recovery time. I hope this helps. 

YOu can soften the look with fillers but I think that your nose is beautiful the way it is. If you use a filler use a soft one like Juvedern or Restylane. 

You have a very nice nose.  Adding filler can soften the tip a bit if you want, but I think your nose is nice as is.