There is a small indentation on the tip of my nose. Could it be fixed with a filler? (Photo)

This is best treated with a combiantion of fillers and/or lasers or microneedling.  Dermabrasion can help as well but has more downtime.   Please see an expert. Best, Dr. Emer.

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 or have a hump/bump. Filling in these depressions will
create a nose that looks straighter and make a bump look smoother.It appears that you would be a good candidate for a non-surgical rhinoplasty.
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.  As with all aesthetic procedures, risks are involved.  I would make sure you understand all risks before considering having a non-surgical rhinoplasty.  I hope this helps.