Non Surgical Rhinoplasty Possible on a Hook Nose?

Thank you for your question. I recommend getting a formal evaluation with a cosmetic dermatologist to go over your desired results. Facial fillers like Voluma, Restylane, and Juvederm along with Botox can be used to improve the symmetry of the nose and lift the tip; however, it won't make the nose appear smaller. Surgery would be needed to improve the nostrils or overall shape. See an expert. Best, Dr. Emer

Depending on the size of your hump, a nonsurgical rhinoplasty may or may not be able to improve the appearance of your nose. Sometimes adding volume in the area of your bridge above your hump (radix) will cause your profile to look straigther and effectively disguise the hump. If your hump is very large, then it is a much better option to reduce the hump rather trying to build up the rest of the bridge to match it.

A Non-Surgical Rhinoplasty may camouflage the appearance of a small nose-hump, but you have to start with a small nose. Injectable Fillers placed above the hump would likely lead to a larger appearance that I doubt you'd find attractive.
You should consult with a board-certified, experienced, Rhinoplasty Specialist to discuss your options.
I've attached a link to my Rhinoplasty photos for your perusal.
I hope this is helpful for you.

Yes. Your nose can be made to look better with small amounts of filler (Juvederm). When the dorsal hump is smaller, the results tend to look more natural. Filler can be also used in the tip region to better define the tip. Seek a consultation with a facial plastic surgeon.

Is it "possible"? - Sure. Anything is possible. (People have been injecting everything you can think of in the noses for well over 100 years including silicone grease and candle wax...)Will it bring about a straight line smoothing of your hump ? - Probably not.
Putting fillers along the nasal dorsum was meant to mask small irregularities and give the illusion of a straight nasal dorsum with SMALL depression. It was never meant and can never hope to successfully deal with nasal "humps".
If your goal is a complete correction of your nose, consult with a few nose surgeons and hear what they have to say to you. If you hear the same comments repeated - you should probably heed them.
Traditionally, a nasal hump is made from the nasal bones the the upper lateral cartilages. When the hump is removed, the roof of the nose is thereby removed. To do so, the side walls need to be moved to the center and at the top pushed against one another. This is done by breaking the nose along its walls. This is a VERY effective surgical technique and if you admire the starlet above's result - you should really consider it.
Good Luck.