What makes the philtrum protrude nicely in the picture on the right? (photos)

The shape of the upper lip is a combination of the actual shape and volume of the lip and the teeth in the Maxilla that hold the lip in place. skeletal structure which has a direct impact on dental occlusion and the position of the teeth directly reflect the shape and position of the lips.
All of these variables contribute to some degree. There is no one single variable that determines what someone’s lip looks like. correct augmentation with fillers turns the upper lip out words and gives it some projection. The work with Fellers should be done cautiously in order to maintain a natural appearance. Patients need to accept their individual genetic make up to some degree. The natural balance between the larger lower lip and typically smaller upper lip should be maintained when working with lip fillers.
I think your best option is to find the most talented and experienced provider working with fillers in your community and discuss your concerns with him or her.
I often refer to the website of Dr. David Mabrie in San Francisco has the gold standard of what can be done in regards to facial aesthetic with the use of fillers. he has a facial plastic surgeon who is devoted his career to only working with facial fillers. His work is some of the best I’ve ever seen.
He has hundreds of before and after pictures on his website and you can get an idea of what can be achieved. You can use those as a reference pictures for what is obtainable in the hands of a talented provider.
Best,
Mats Hagstrom MD